Observation of a New
bBaryon
S. Chatrchyan et al.* (CMS Collaboration)
(Received 26 April 2012; published 21 June 2012)
The observation of a new b baryon via its strong decay into bþ(plus charge conjugates) is reported.
The measurement uses a data sample of pp collisions atpffiffiffis¼ 7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5:3 fb1. The known b baryon is reconstructed
via the decay chain b ! J=c ! þ0, with 0! p. A peak is observed in the
distribution of the difference between the mass of the bþ system and the sum of the masses of the
b and þ, with a significance exceeding 5 standard deviations. The mass difference of the peak is
14:84 0:74ðstatÞ 0:28ðsystÞ MeV. The new state most likely corresponds to the JP¼ 3=2þ
compan-ion of the b.
DOI:10.1103/PhysRevLett.108.252002 PACS numbers: 14.20.Mr
According to the well-established quark model and cor-responding spectroscopy of baryons, there are several pre-dicted baryons containing one strange and one beauty valence quark. These include the b (ground state) and
0b, both with total angular momentum and parity JP ¼
1=2þ, a JP¼ 3=2þ state with angular momentum L ¼ 0
(often referred to, as will be done in this Letter, as b), and
two states with JP ¼ 1=2 and 3=2, both with angular
momentum L ¼ 1. These baryons can be neutral (valence quark content u s b) or negatively charged (d s b). At the Tevatron, baryons with masses and decay modes consistent with the theoretical predictions for the ground state bbaryons have been observed [1–3], although their
quantum numbers have not yet been established. The al-lowed decays of the experimentally missing b states
should be analogous to the charmed sector [4–6]. In addi-tion, theoretical calculations [7–11] predict the mass dif-ference between the 0band bto be smaller than the mass
of the pion, in which case the strong decay 0b ! b is
kinematically forbidden. The mass difference between the b and b, however, is expected to be large enough to
allow such a decay.
This Letter presents a search for the decay 0b ! bþ, with b ! J=c, J=c! þ, ! 0, and 0 ! p. Charge conjugate states are
im-plied throughout. The reconstruction of such decays in-volves the presence of three secondary vertices, where the b, , and 0decay, which are well separated from the
primary interaction vertex. The analysis is based on a data sample of pp collisions atpffiffiffis¼ 7 TeV, collected in 2011 by the Compact Muon Solenoid (CMS) experiment at the
Large Hadron Collider (LHC), corresponding to an inte-grated luminosity of 5:3 fb1.
The CMS apparatus is described in detail in Ref. [12]. Its central feature is a superconducting solenoid, of 6 m inter-nal diameter, providing a field of 3.8 T. The main subde-tectors used in this analysis are the silicon tracker and the muon systems. The silicon tracker, composed of pixel and strip detector modules, is immersed in the magnetic field, and enables the measurement of charged particle momenta over the pseudorapidity range jj < 2:5, where ¼ lnðtan=2Þ and is the polar angle of the track relative to the counterclockwise beam direction. Muons are iden-tified in the rangejj < 2:4 using gas-ionization detectors embedded in the steel return yoke of the magnet.
The events used in this analysis were collected using the two-level trigger system of CMS. The first level consists of custom hardware processors and uses information from the muon systems to select events with two muons. The ‘‘high-level trigger’’ processor farm further decreases the event rate before data storage, requiring two opposite-sign muons compatible with being the decay products of a J=c, either promptly produced or displaced from the primary vertex (PV). The nonprompt J=c trigger requires two opposite-sign muons with an invariant mass within 200 MeV of the J=c mass [13], single muon transverse momentum pT> 3, 3.5, 4, or 5 GeV, and dimuon vertex fit
2 probability larger than 10% or 15%. The requirements were made tighter depending on the LHC instantaneous luminosity so as to limit the trigger rate. In addition, the dimuon vertex must be separated from the beam line by more than 3 times the uncertainty on the separation vertex,
which includes the transverse vertex resolution (indepen-dently estimated for each event) and the beam line position uncertainty. Finally, the requirement cos > 0:9 is also applied, where is the angle, in the plane transverse to the beam, between the dimuon momentum and the direc-tion from the beam line to the dimuon vertex. The prompt J=c trigger requires two opposite-sign muons with an *Full author list given at the end of the article.
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distri-bution of this work must maintain attridistri-bution to the author(s) and the published article’s title, journal citation, and DOI.
invariant mass within 250 MeV of the J=c mass [13], dimuon pT> 10 or 13 GeV (depending on the
instanta-neous luminosity), dimuon rapidityjyj < 1:25, and dimuon vertex fit 2 probability greater than 0.5%.
The reconstruction of the b ! J=c candidates begins by identifying J=c ! þ decays. The candi-date J=c mesons are built by combining pairs of oppo-sitely charged muons (tracks in the silicon tracker matched to tracks in the muon detectors) satisfying the trigger conditions and having an invariant mass within 150 MeV of the J=c mass. Candidate 0 baryons are reconstructed
in decays to a pion () and a proton (p) with opposite
charges, where the higher momentum track is assumed to be the proton. Both tracks are required to have a track fit 2=ndf < 5, where ndf is the number of degrees of
free-dom, and at least six hits in the silicon tracker. The 0
candidate vertex must have a fit 2=ndf < 7 and be
dis-placed from the beam line by more than 10vertex. Possible
contamination from misreconstructed KS mesons is
re-moved by requiring that the candidate mass, when assum-ing that both tracks are pions, differs from the KSmass [13]
by more than 20 MeV. Candidate baryons are recon-structed by combining a 0candidate with a track (
) of
the same charge as the . A kinematic vertex fit [14] is
performed, assuming that the track is a pion, and with the 0 candidate mass constrained to its world-average value
[13]. A veto window of 20 MeV around the mass [13] is applied when assuming that the candidate is a kaon.
The is then combined with the J=c to form a b candidate, with a kinematic vertex fit constraining their masses to the world-average values [13]. On average, the events used in this analysis have around eight recon-structed primary vertices (PV). The PV closest in three dimensions to the b trajectory is taken as the one where
the b was produced.
The b signal selection criteria are chosen by an iter-ative algorithm that maximizes both the signal yield and the significance, calculated as S=pffiffiffiffiffiffiffiffiffiffiffiffiffiS þ B, where the signal (S) and background (B) yields are evaluated in a window of 40 MeV around the
b mass, 5790:5 2:7 MeV [13].
The value of B is linearly interpolated to this signal region from the two mass sidebands, located between 40 and 100 MeV away from the peak value. Thirty variables are used to optimize the b signal selection. At every
itera-tion, two variables are chosen randomly, where one of them is tightened and the other loosened. If S and the signifi-cance increase, the new set of values is accepted. To avoid ending up in a local maximum, an iteration is accepted if the significance decreases by less than a random number uniformly generated between 0 and 10%. The variables used for the selection include the pTof both muons, and of
the J=c, p, , , , and b. The muons and b can
have different pTselections in the pseudorapidity regions
jj < 1:2 and jj > 1:2, where jj ¼ 1:2 is the transition between the barrel and endcap detectors. The algorithm
also tunes the requirements on the differences between the reconstructed masses and the world-average masses for the 0, , and J=c, with the latter case being different for
jðJ=cÞj < 1:2 and jðJ=cÞj > 1:2. Also, the total J=c pseudorapidity coverage can be adjusted to be smaller than the fulljðJ=cÞj < 2:4 range.
To select a b sample with a good signal-over-background ratio, it is important to reject promptly pro-duced tracks. This is done via a selection on their trans-verse impact parameter significances Dip=Dip, where the
impact parameter Dipis calculated with respect to the beam
line and Dipis its uncertainty. This procedure is applied to
the p, , and tracks, as well as to the 0 and
trajectories. Long-lived particles (0, , and b) are
selected by requirements on their transverse decay lengths and on the significance Lxy=Lxyof the transverse distance
between their production and decay vertices Lxy, where
Lxy is the uncertainty of Lxy. Minimal fit confidence
levels are required on the 0, , and
b decay vertices,
while the three-dimensional distance significance must be smaller than the optimized thresholds for the distances between the trajectory and the J=c decay vertex, as well as between the b trajectory and the chosen PV.
The J=c invariant-mass distribution for the b
candidates passing the selection criteria is shown in Fig. 1, together with the result of a fit with a Gaussian function representing the signal plus a second-order poly-nomial representing the background, which gives a signal yield of 108 14 events. The same figure also displays the invariant-mass distribution for background events, in which the and proton have the same charge, giving
) [GeV] -Ξ ψ M(J/ 5.6 5.7 5.8 5.9 6 6.1
candidates per 20 MeV
- b Ξ 0 10 20 30 40 50 60 70 data -b Ξ Ξ π Opposite-sign p Ξ π Same-sign p Signal+background fit Background fit CMS = 7 TeV s pp, -1 L = 5.3 fb
FIG. 1 (color online). Invariant-mass distributions of the se-lected b candidates (closed circles) and of the J=c pairs
where the proton and have the same charge (open squares).
The blue solid curve represents the result of the signal-plus-background fit to the b distribution, while the red dashed line
shows the corresponding background component.
further evidence that the observed peak corresponds to a real b signal. The b mass extracted from the fit is 5795:0 3:1ðstatÞ MeV, in good agreement with the world-average value [13]. The corresponding mass resolu-tion is 23:7 3:2ðstatÞ MeV, in agreement with the value 22:5 4:7 MeV, obtained from a detailed Monte Carlo (MC) simulation of the CMS detector response, using
PYTHIA 6.409[15],EVTGEN[16], andGEANT4[17].
To search for 0b baryons, the b candidates with a mass within 2.5 standard deviations of the fitted peak value are combined with tracks, assumed to be pions, with a charge opposite to the charge (opposite-sign pairs)
and coming from the selected PV, with a significance less than 3 standard deviations on the distance between the track trajectory and the PV. Other quality requirements applied to the tracks are pT> 0:25 GeV, at least two hits
in the silicon pixel layers, at least five hits in the entire tracker, and a track fit 2=ndf < 2:5.
The 0b search uses the mass difference Q between the measured J=cþ invariant mass and the sum of the masses of the decay products, Q ¼ MðJ=cþÞ MðJ=cÞ MðÞ, where MðÞ is the charged-pion mass [13]. The search for new resonances in the Q distri-bution requires a reliable background shape. A background model is built using candidates where the prompt pion and the b have the same charge (same-sign pairs), given that the background is expected to be dominated by combina-torial sources, as checked by MC studies. The measured momentum distributions of b candidates and same-sign pions (pðbÞ, pðÞ), together with the distribution of the
angle between them (), are used to randomly generate uncorrelated values for pðbÞ, pðÞ, and . Given the
limited statistical precision of the b momentum distri-bution, the corresponding random numbers are generated from a parametrized version using the fit function fbðpÞ ¼ pk1ek2p, where ki are free parameters. The
three random values are then combined to calculate a Q value for predicting the combinatorial background distri-bution. One hundred million Q values are generated in this way and the resulting distribution is fitted to the function Qc1ðec2Qþ ec3Qþ ec4QÞ, where c
i are free
parame-ters. Figure 2(a) compares the Q distribution of the same-sign 0b candidates with the predicted background shape. Alternative functional forms of fbðpÞ are used to
estimate the systematic uncertainty associated with this method, which contributes to the determination of the background parameters.
The measured opposite-sign Q distribution is displayed in Fig. 2(b) for the range 0–50 MeV. The 21 events ob-served in the region 12 < Q < 18 MeV represent a clear excess with respect to the expected background yield of 3:0 1:4 events, evaluated by integrating the background function in this Q window. An unbinned maximum-likelihood fit is performed to the opposite-sign Q distribu-tion with a Breit-Wigner distribudistribu-tion convolved with a
Gaussian function, added to the background function pre-viously described. The Gaussian resolution of the peak is constrained to 1:91 0:11 MeV, as determined in the signal MC simulation, and the background parameters are allowed to float within their total uncertainties (statis-tical plus systematic, added in quadrature). Figure2(b)also shows the result of the fit. A peak is clearly visible above the background continuum. The fitted parameters of the peak are Q ¼ 14:84 0:74ðstatÞ MeV and Breit-Wigner width ¼ 2:1 1:7ðstatÞ MeV. The fitted Breit-Wigner width agrees with ¼ 0:51 0:16 MeV, the value ob-tained following Eq. (102) of Ref. [18], based on lattice quantum chromodynamic calculations.
To evaluate the significance of the signal, the likelihood Lsþbof the signal-plus-background fit is determined. The
) [MeV] π ) - M( -Ξ ψ ) - M(J/ + π -Ξ ψ M(J/ 0 100 200 300 400
candidates per 10 MeV
*0 b Ξ 0 5 10 15 20 25 30 Same-sign data Background CMS = 7 TeV s pp, -1 L = 5.3 fb (a) ) [MeV] π ) - M( -Ξ ψ ) - M(J/ + π -Ξ ψ M(J/ 0 10 20 30 40 50
candidates per 2 MeV
*0 b Ξ 0 2 4 6 8 10 12 14 16 (b) Opposite-sign data Signal+background fit Background CMS = 7 TeV s pp, -1 L = 5.3 fb
FIG. 2 (color online). (a) Same-sign Q distribution (closed circles) and result of a fit with the background model (red dashed curve) in the range 0 < Q < 400 MeV. (b) Opposite-sign Q distribution (closed circles) in the 0 < Q < 50 MeV range, along with the result of the signal-plus-background fit (blue solid curve); the background term is also shown (red dashed curve).
fit is then repeated using the background-only model to obtain a new likelihood Lb. The parameters obtained from
the background fit are allowed to float so that their uncer-tainties and correlations contribute to the calculation of the significance. The logarithmic likelihood ratioffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
lnðLsþb=LbÞ
p
would indicate a statistical significance of 6.9 standard deviations (), corresponding to a probability of 2:5 1012for a background fluctuation of this signifi-cance or more to be observed. The signifisignifi-cance remains the same if the fit is repeated using the theoretically expected width, allowing it to vary within the range of the theoretical uncertainty. The signal significance is also evaluated by generating pseudoexperiments in which the background distribution is varied within its statistical uncertainty, and determining the background fluctuation probability (‘‘p value’’) as the number of experiments that give a fit with the same significance or higher than in the data. The ‘‘look-elsewhere effect’’ [19] is assessed by searching for a peak, of width between 0 and 25 MeV, in the extended mass range 0 < Q < 50 MeV, where the 0b is theoretically expected. The resulting background fluctuation probability is p ¼ 1:3 108, which corresponds to a 5:7 equivalent Gaussian significance. If the search range is further ex-tended to 0 < Q < 400 MeV, the equivalent Gaussian sig-nificance becomes 5:3.
This analysis has been repeated using simulated Bþ, B0, Bs, and bsamples, obtained by the detailed MC
simula-tion of the CMS detector already mensimula-tioned. The samples contain events in which the b hadron is forced to decay to a J=c, which decays to þ. No evidence of peaks due to partially reconstructed b-hadron decays is observed in these samples. The opposite-sign Q distribution obtained using b candidates from the lower- and higher-mass sidebands of the signal peak also shows no excess, indicat-ing that the observed peak is not caused by fake b candidates.
The systematic uncertainty on the measured Q value is evaluated through the signal MC simulation. The recon-structed Q value in MC simulations is measured to be 0:23 0:10 MeV above the generated value. This is con-sistent with the observation that the measured 0 and
masses are 0:16 0:05 and 0:18 0:14 MeV, respec-tively, above their world averages. The sum in quadrature of the shift and its statistical uncertainty, 0.25 MeV, is considered as the systematic uncertainty due to this effect. As an extreme fitting scenario, a flat function is used for the background shape, leading to a Q value 0.12 MeV higher than the value measured with the nominal background model. Adding in quadrature this uncertainty with the previous one results in a total Q systematic uncertainty of 0.28 MeV.
The observation of this resonance, corresponding to the one observed in the charm sector [4], and its mass mea-surement add valuable information to the understanding of the interactions between quarks within a baryon.
In summary, a new bbaryon has been observed in pp
collisions atpffiffiffis¼ 7 TeV, using data collected by the CMS experiment, corresponding to an integrated luminosity of 5:3 fb1. The signal is observed with a significance exceeding 5 standard deviations. The measured Q ¼ MðJ=cþÞ MðJ=cÞ MðÞ value is 14:84 0:74ðstatÞ 0:28ðsystÞ MeV. Given the charged-pion and b masses [13], the resulting b-baryon mass is 5945:0 0:7ðstatÞ 0:3ðsystÞ 2:7ðPDGÞ MeV, where the last un-certainty reflects the present accuracy of the b mass from the Particle Data Group [13]. While the width of the new baryon is not measured with good statistical precision, it is compatible with theoretical expectations [18]. Given its measured mass and decay mode, the new baryon is likely to be the 0b , with JP¼ 3=2þ.
We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC machine. We thank the technical and administrative staff at CERN and other CMS institutes, and acknowledge sup-port from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA).
[1] V. M. Abazov et al., Phys. Rev. Lett. 99, 052001 (2007).
[2] T. Aaltonen et al., Phys. Rev. Lett. 99, 052002 (2007).
[3] T. Aaltonen et al.,Phys. Rev. Lett.107, 102001 (2011). [4] P. Avery et al.,Phys. Rev. Lett.75, 4364 (1995). [5] J. Alexander et al.,Phys. Rev. Lett.83, 3390 (1999). [6] S. Csorna et al.,Phys. Rev. Lett.86, 4243 (2001). [7] N. Mathur, R. Lewis, and R. M. Woloshyn,Phys. Rev. D
66, 014502 (2002).
[8] E. E. Jenkins,Phys. Rev. D77, 034012 (2008).
[9] R. Lewis and R. M. Woloshyn,Phys. Rev. D 79, 014502 (2009).
[10] D. Ebert, R. N. Faustov, and V. O. Galkin,Phys. Rev. D84, 014025 (2011).
[11] M. Karliner, B. Keren-Zur, H. J. Lipkin, and J. L. Rosner,
Ann. Phys. (N.Y.)324, 2 (2009).
[12] S. Chatrchyan et al. (CMS Collaboration), JINST 3, S08004 (2008).
[13] K. Nakamura et al.,J. Phys. G37, 075021 (2010). [14] G. E. Forden and D. H. Saxon, Nucl. Instrum. Methods
Phys. Res., Sect. A248, 439 (1986).
[15] T. Sjostrand, S. Mrenna, and P. Z. Skands,J. High Energy Phys. 05 (2006) 026.
[16] D. J. Lange,Nucl. Instrum. Methods Phys. Res., Sect. A 462, 152 (2001).
[17] S. Agostinelli et al.,Nucl. Instrum. Methods Phys. Res., Sect. A506, 250 (2003).
[18] W. Detmold, C.-J. D. Lin, and S. Meinel,
arXiv:1203.3378.
[19] L. Demortier, in PHYSTAT-LHC Workshop on Statistical Issues for LHC Physics, edited by L. Lyons, H. Prosper, and A. de Roeck (CERN, Geneva, 2008).
S. Chatrchyan,1V. Khachatryan,1A. M. Sirunyan,1A. Tumasyan,1W. Adam,2T. Bergauer,2M. Dragicevic,2J. Ero¨,2 C. Fabjan,2,bM. Friedl,2R. Fru¨hwirth,2,bV. M. Ghete,2J. Hammer,2N. Ho¨rmann,2J. Hrubec,2M. Jeitler,2,b W. Kiesenhofer,2V. Knu¨nz,2M. Krammer,2,bD. Liko,2I. Mikulec,2M. Pernicka,2,aB. Rahbaran,2C. Rohringer,2
H. Rohringer,2R. Scho¨fbeck,2J. Strauss,2A. Taurok,2P. Wagner,2W. Waltenberger,2G. Walzel,2E. Widl,2 C.-E. Wulz,2,bV. Mossolov,3N. Shumeiko,3J. Suarez Gonzalez,3S. Bansal,4T. Cornelis,4E. A. De Wolf,4 X. Janssen,4S. Luyckx,4T. Maes,4L. Mucibello,4S. Ochesanu,4B. Roland,4R. Rougny,4M. Selvaggi,4 Z. Staykova,4H. Van Haevermaet,4P. Van Mechelen,4N. Van Remortel,4A. Van Spilbeeck,4F. Blekman,5 S. Blyweert,5J. D’Hondt,5R. Gonzalez Suarez,5A. Kalogeropoulos,5M. Maes,5A. Olbrechts,5W. Van Doninck,5 P. Van Mulders,5G. P. Van Onsem,5I. Villella,5O. Charaf,6B. Clerbaux,6G. De Lentdecker,6V. Dero,6A. P. R. Gay,6 T. Hreus,6A. Le´onard,6P. E. Marage,6T. Reis,6L. Thomas,6C. Vander Velde,6P. Vanlaer,6J. Wang,6V. Adler,7
K. Beernaert,7A. Cimmino,7S. Costantini,7G. Garcia,7M. Grunewald,7B. Klein,7J. Lellouch,7A. Marinov,7 J. Mccartin,7A. A. Ocampo Rios,7D. Ryckbosch,7N. Strobbe,7F. Thyssen,7M. Tytgat,7L. Vanelderen,7 P. Verwilligen,7S. Walsh,7E. Yazgan,7N. Zaganidis,7S. Basegmez,8G. Bruno,8R. Castello,8L. Ceard,8C. Delaere,8
T. du Pree,8D. Favart,8L. Forthomme,8A. Giammanco,8,cJ. Hollar,8V. Lemaitre,8J. Liao,8O. Militaru,8 C. Nuttens,8D. Pagano,8A. Pin,8K. Piotrzkowski,8N. Schul,8J. M. Vizan Garcia,8N. Beliy,9T. Caebergs,9 E. Daubie,9G. H. Hammad,9G. A. Alves,10M. Correa Martins Junior,10D. De Jesus Damiao,10T. Martins,10
M. E. Pol,10M. H. G. Souza,10W. L. Alda´ Ju´nior,11W. Carvalho,11A. Custo´dio,11E. M. Da Costa,11 C. De Oliveira Martins,11S. Fonseca De Souza,11D. Matos Figueiredo,11L. Mundim,11H. Nogima,11V. Oguri,11
W. L. Prado Da Silva,11A. Santoro,11L. Soares Jorge,11A. Sznajder,11C. A. Bernardes,12,dF. A. Dias,12,e T. R. Fernandez Perez Tomei,12E. M. Gregores,12,dC. Lagana,12F. Marinho,12P. G. Mercadante,12,dS. F. Novaes,12
Sandra S. Padula,12V. Genchev,13,fP. Iaydjiev,13,fS. Piperov,13M. Rodozov,13S. Stoykova,13G. Sultanov,13 V. Tcholakov,13R. Trayanov,13M. Vutova,13A. Dimitrov,14R. Hadjiiska,14V. Kozhuharov,14L. Litov,14B. Pavlov,14
P. Petkov,14J. G. Bian,15G. M. Chen,15H. S. Chen,15C. H. Jiang,15D. Liang,15S. Liang,15X. Meng,15J. Tao,15 J. Wang,15X. Wang,15Z. Wang,15H. Xiao,15M. Xu,15J. Zang,15Z. Zhang,15C. Asawatangtrakuldee,16Y. Ban,16 S. Guo,16Y. Guo,16W. Li,16S. Liu,16Y. Mao,16S. J. Qian,16H. Teng,16S. Wang,16B. Zhu,16W. Zou,16C. Avila,17
J. P. Gomez,17B. Gomez Moreno,17A. F. Osorio Oliveros,17J. C. Sanabria,17N. Godinovic,18D. Lelas,18 R. Plestina,18,gD. Polic,18I. Puljak,18,fZ. Antunovic,19M. Kovac,19V. Brigljevic,20S. Duric,20K. Kadija,20 J. Luetic,20S. Morovic,20A. Attikis,21M. Galanti,21G. Mavromanolakis,21J. Mousa,21C. Nicolaou,21F. Ptochos,21
P. A. Razis,21M. Finger,22M. Finger, Jr.,22Y. Assran,23,hS. Elgammal,23,iA. Ellithi Kamel,23,jS. Khalil,23,i M. A. Mahmoud,23,kA. Radi,23,lM. Kadastik,24M. Mu¨ntel,24M. Raidal,24L. Rebane,24A. Tiko,24V. Azzolini,25
P. Eerola,25G. Fedi,25M. Voutilainen,25J. Ha¨rko¨nen,26A. Heikkinen,26V. Karima¨ki,26R. Kinnunen,26 M. J. Kortelainen,26T. Lampe´n,26K. Lassila-Perini,26S. Lehti,26T. Linde´n,26P. Luukka,26T. Ma¨enpa¨a¨,26 T. Peltola,26E. Tuominen,26J. Tuominiemi,26E. Tuovinen,26D. Ungaro,26L. Wendland,26K. Banzuzi,27 A. Karjalainen,27A. Korpela,27T. Tuuva,27M. Besancon,28S. Choudhury,28M. Dejardin,28D. Denegri,28 B. Fabbro,28J. L. Faure,28F. Ferri,28S. Ganjour,28A. Givernaud,28P. Gras,28G. Hamel de Monchenault,28P. Jarry,28
E. Locci,28J. Malcles,28L. Millischer,28A. Nayak,28J. Rander,28A. Rosowsky,28I. Shreyber,28M. Titov,28 S. Baffioni,29F. Beaudette,29L. Benhabib,29L. Bianchini,29M. Bluj,29,mC. Broutin,29P. Busson,29C. Charlot,29 N. Daci,29T. Dahms,29L. Dobrzynski,29R. Granier de Cassagnac,29M. Haguenauer,29P. Mine´,29C. Mironov,29
M. Nguyen,29C. Ochando,29P. Paganini,29D. Sabes,29R. Salerno,29Y. Sirois,29C. Veelken,29A. Zabi,29 J.-L. Agram,30,nJ. Andrea,30D. Bloch,30D. Bodin,30J.-M. Brom,30M. Cardaci,30E. C. Chabert,30C. Collard,30 E. Conte,30,nF. Drouhin,30,nC. Ferro,30J.-C. Fontaine,30,nD. Gele´,30U. Goerlach,30P. Juillot,30A.-C. Le Bihan,30
J. Chasserat,32R. Chierici,32,fD. Contardo,32P. Depasse,32H. El Mamouni,32J. Fay,32S. Gascon,32 M. Gouzevitch,32B. Ille,32T. Kurca,32M. Lethuillier,32L. Mirabito,32S. Perries,32V. Sordini,32S. Tosi,32 Y. Tschudi,32P. Verdier,32S. Viret,32Z. Tsamalaidze,33G. Anagnostou,34S. Beranek,34M. Edelhoff,34L. Feld,34 N. Heracleous,34O. Hindrichs,34R. Jussen,34K. Klein,34J. Merz,34A. Ostapchuk,34A. Perieanu,34F. Raupach,34
J. Sammet,34S. Schael,34D. Sprenger,34H. Weber,34B. Wittmer,34V. Zhukov,34,oM. Ata,35J. Caudron,35 E. Dietz-Laursonn,35M. Erdmann,35A. Gu¨th,35T. Hebbeker,35C. Heidemann,35K. Hoepfner,35D. Klingebiel,35
P. Kreuzer,35J. Lingemann,35C. Magass,35M. Merschmeyer,35A. Meyer,35M. Olschewski,35P. Papacz,35 H. Pieta,35H. Reithler,35S. A. Schmitz,35L. Sonnenschein,35J. Steggemann,35D. Teyssier,35M. Weber,35 M. Bontenackels,36V. Cherepanov,36G. Flu¨gge,36H. Geenen,36M. Geisler,36W. Haj Ahmad,36F. Hoehle,36 B. Kargoll,36T. Kress,36Y. Kuessel,36A. Nowack,36L. Perchalla,36O. Pooth,36J. Rennefeld,36P. Sauerland,36
A. Stahl,36M. Aldaya Martin,37J. Behr,37W. Behrenhoff,37U. Behrens,37M. Bergholz,37,pA. Bethani,37 K. Borras,37A. Burgmeier,37A. Cakir,37L. Calligaris,37A. Campbell,37E. Castro,37F. Costanza,37D. Dammann,37 G. Eckerlin,37D. Eckstein,37D. Fischer,37G. Flucke,37A. Geiser,37I. Glushkov,37S. Habib,37J. Hauk,37H. Jung,37,f
M. Kasemann,37P. Katsas,37C. Kleinwort,37H. Kluge,37A. Knutsson,37M. Kra¨mer,37D. Kru¨cker,37 E. Kuznetsova,37W. Lange,37W. Lohmann,37,pB. Lutz,37R. Mankel,37I. Marfin,37M. Marienfeld,37 I.-A. Melzer-Pellmann,37A. B. Meyer,37J. Mnich,37A. Mussgiller,37S. Naumann-Emme,37J. Olzem,37H. Perrey,37
A. Petrukhin,37D. Pitzl,37A. Raspereza,37P. M. Ribeiro Cipriano,37C. Riedl,37M. Rosin,37J. Salfeld-Nebgen,37 R. Schmidt,37,pT. Schoerner-Sadenius,37N. Sen,37A. Spiridonov,37M. Stein,37R. Walsh,37C. Wissing,37 C. Autermann,38V. Blobel,38S. Bobrovskyi,38J. Draeger,38H. Enderle,38J. Erfle,38U. Gebbert,38M. Go¨rner,38
T. Hermanns,38R. S. Ho¨ing,38K. Kaschube,38G. Kaussen,38H. Kirschenmann,38R. Klanner,38J. Lange,38 B. Mura,38F. Nowak,38T. Peiffer,38N. Pietsch,38C. Sander,38H. Schettler,38P. Schleper,38E. Schlieckau,38 A. Schmidt,38M. Schro¨der,38T. Schum,38H. Stadie,38G. Steinbru¨ck,38J. Thomsen,38C. Barth,39J. Berger,39
T. Chwalek,39W. De Boer,39A. Dierlamm,39M. Feindt,39M. Guthoff,39,fC. Hackstein,39F. Hartmann,39 M. Heinrich,39H. Held,39K. H. Hoffmann,39S. Honc,39I. Katkov,39,oJ. R. Komaragiri,39D. Martschei,39 S. Mueller,39Th. Mu¨ller,39M. Niegel,39A. Nu¨rnberg,39O. Oberst,39A. Oehler,39J. Ott,39G. Quast,39K. Rabbertz,39
F. Ratnikov,39N. Ratnikova,39S. Ro¨cker,39A. Scheurer,39F.-P. Schilling,39G. Schott,39H. J. Simonis,39 F. M. Stober,39D. Troendle,39R. Ulrich,39J. Wagner-Kuhr,39T. Weiler,39M. Zeise,39G. Daskalakis,40T. Geralis,40
S. Kesisoglou,40A. Kyriakis,40D. Loukas,40I. Manolakos,40A. Markou,40C. Markou,40C. Mavrommatis,40 E. Ntomari,40L. Gouskos,41T. J. Mertzimekis,41A. Panagiotou,41N. Saoulidou,41I. Evangelou,42C. Foudas,42,f P. Kokkas,42N. Manthos,42I. Papadopoulos,42V. Patras,42G. Bencze,43C. Hajdu,43,fP. Hidas,43D. Horvath,43,q B. Radics,43F. Sikler,43V. Veszpremi,43G. Vesztergombi,43,rN. Beni,44S. Czellar,44J. Molnar,44J. Palinkas,44 Z. Szillasi,44J. Karancsi,45P. Raics,45Z. L. Trocsanyi,45B. Ujvari,45S. B. Beri,46V. Bhatnagar,46N. Dhingra,46 R. Gupta,46M. Jindal,46M. Kaur,46M. Z. Mehta,46N. Nishu,46L. K. Saini,46A. Sharma,46J. Singh,46S. Ahuja,47
A. Bhardwaj,47B. C. Choudhary,47A. Kumar,47A. Kumar,47S. Malhotra,47M. Naimuddin,47K. Ranjan,47 V. Sharma,47R. K. Shivpuri,47S. Banerjee,48S. Bhattacharya,48S. Dutta,48B. Gomber,48Sa. Jain,48Sh. Jain,48 R. Khurana,48S. Sarkar,48M. Sharan,48A. Abdulsalam,49R. K. Choudhury,49D. Dutta,49S. Kailas,49V. Kumar,49
P. Mehta,49A. K. Mohanty,49,fL. M. Pant,49P. Shukla,49T. Aziz,50S. Ganguly,50M. Guchait,50,sM. Maity,50,t G. Majumder,50K. Mazumdar,50G. B. Mohanty,50B. Parida,50K. Sudhakar,50N. Wickramage,50S. Banerjee,51
S. Dugad,51H. Arfaei,52H. Bakhshiansohi,52,uS. M. Etesami,52,vA. Fahim,52,uM. Hashemi,52A. Jafari,52,u M. Khakzad,52A. Mohammadi,52,wM. Mohammadi Najafabadi,52S. Paktinat Mehdiabadi,52B. Safarzadeh,52,x
M. Zeinali,52,vM. Abbrescia,53a,53bL. Barbone,53a,53bC. Calabria,53a,53b,fS. S. Chhibra,53a,53bA. Colaleo,53a D. Creanza,53a,53cN. De Filippis,53a,53c,fM. De Palma,53a,53bL. Fiore,53aG. Iaselli,53a,53cL. Lusito,53a,53b G. Maggi,53a,53cM. Maggi,53aB. Marangelli,53a,53bS. My,53a,53cS. Nuzzo,53a,53bN. Pacifico,53a,53bA. Pompili,53a,53b G. Pugliese,53a,53cG. Selvaggi,53a,53bL. Silvestris,53aG. Singh,53a,53bG. Zito,53aG. Abbiendi,54aA. C. Benvenuti,54a
D. Bonacorsi,54a,54bS. Braibant-Giacomelli,54a,54bL. Brigliadori,54a,54bP. Capiluppi,54a,54bA. Castro,54a,54b F. R. Cavallo,54aM. Cuffiani,54a,54bG. M. Dallavalle,54aF. Fabbri,54aA. Fanfani,54a,54bD. Fasanella,54a,54b,f P. Giacomelli,54aC. Grandi,54aL. Guiducci,54a,54bS. Marcellini,54aG. Masetti,54aM. Meneghelli,54a,54b,f A. Montanari,54aF. L. Navarria,54a,54bF. Odorici,54aA. Perrotta,54aF. Primavera,54a,54bA. M. Rossi,54a,54b T. Rovelli,54a,54bG. Siroli,54a,54bR. Travaglini,54a,54bS. Albergo,55a,55bG. Cappello,55a,55bM. Chiorboli,55a,55b S. Costa,55a,55bR. Potenza,55a,55bA. Tricomi,55a,55bC. Tuve,55a,55bG. Barbagli,56aV. Ciulli,56a,56bC. Civinini,56a R. D’Alessandro,56a,56bE. Focardi,56a,56bS. Frosali,56a,56bE. Gallo,56aS. Gonzi,56a,56bM. Meschini,56aS. Paoletti,56a
G. Sguazzoni,56aA. Tropiano,56a,fL. Benussi,57S. Bianco,57S. Colafranceschi,57,yF. Fabbri,57D. Piccolo,57 P. Fabbricatore,58R. Musenich,58A. Benaglia,59a,59b,fF. De Guio,59a,59bL. Di Matteo,59a,59b,fS. Fiorendi,59a,59b
S. Gennai,59a,fA. Ghezzi,59a,59bS. Malvezzi,59aR. A. Manzoni,59a,59bA. Martelli,59a,59bA. Massironi,59a,59b,f D. Menasce,59aL. Moroni,59aM. Paganoni,59a,59bD. Pedrini,59aS. Ragazzi,59a,59bN. Redaelli,59aS. Sala,59a T. Tabarelli de Fatis,59a,59bS. Buontempo,60aC. A. Carrillo Montoya,60a,fN. Cavallo,60a,zA. De Cosa,60a,60b,f O. Dogangun,60a,60bF. Fabozzi,60a,zA. O. M. Iorio,60aL. Lista,60aS. Meola,60a,aaM. Merola,60a,60bP. Paolucci,60a,f
P. Azzi,61aN. Bacchetta,61a,fP. Bellan,61a,61bD. Bisello,61a,61bA. Branca,61a,fR. Carlin,61a,61bP. Checchia,61a T. Dorigo,61aF. Gasparini,61a,61bU. Gasparini,61a,61bA. Gozzelino,61aK. Kanishchev,61a,61cS. Lacaprara,61a
I. Lazzizzera,61a,61cM. Margoni,61a,61bA. T. Meneguzzo,61a,61bN. Pozzobon,61a,61bP. Ronchese,61a,61b F. Simonetto,61a,61bE. Torassa,61aM. Tosi,61a,61b,fS. Vanini,61a,61bP. Zotto,61a,61bG. Zumerle,61a,61b M. Gabusi,62a,62bS. P. Ratti,62a,62bC. Riccardi,62a,62bP. Torre,62a,62bP. Vitulo,62a,62bM. Biasini,63a,63bG. M. Bilei,63a
L. Fano`,63a,63bP. Lariccia,63a,63bA. Lucaroni,63a,63b,fG. Mantovani,63a,63bM. Menichelli,63aA. Nappi,63a,63b F. Romeo,63a,63bA. Saha,63aA. Santocchia,63a,63bS. Taroni,63a,63b,fP. Azzurri,64a,64cG. Bagliesi,64aT. Boccali,64a G. Broccolo,64a,64cR. Castaldi,64aR. T. D’Agnolo,64a,64cR. Dell’Orso,64aF. Fiori,64a,64b,fL. Foa`,64a,64cA. Giassi,64a
A. Kraan,64aF. Ligabue,64a,64cT. Lomtadze,64aL. Martini,64a,bbA. Messineo,64a,64bF. Palla,64aA. Rizzi,64a,64b A. T. Serban,64a,ccP. Spagnolo,64aP. Squillacioti,64a,fR. Tenchini,64aG. Tonelli,64a,64b,fA. Venturi,64a,f P. G. Verdini,64aL. Barone,65a,65bF. Cavallari,65aD. Del Re,65a,65b,fM. Diemoz,65aM. Grassi,65a,65b,fE. Longo,65a,65b
P. Meridiani,65a,fF. Micheli,65a,65bS. Nourbakhsh,65a,65bG. Organtini,65a,65bR. Paramatti,65aS. Rahatlou,65a,65b M. Sigamani,65aL. Soffi,65a,65bN. Amapane,66a,66bR. Arcidiacono,66a,66cS. Argiro,66a,66bM. Arneodo,66a,66c C. Biino,66aC. Botta,66a,66bN. Cartiglia,66aM. Costa,66a,66bN. Demaria,66aA. Graziano,66a,66bC. Mariotti,66a,f
S. Maselli,66aE. Migliore,66a,66bV. Monaco,66a,66bM. Musich,66a,fM. M. Obertino,66a,66cN. Pastrone,66a M. Pelliccioni,66aA. Potenza,66a,66bA. Romero,66a,66bM. Ruspa,66a,66cR. Sacchi,66a,66bV. Sola,66a,66b
A. Solano,66a,66bA. Staiano,66aA. Vilela Pereira,66aS. Belforte,67aV. Candelise,67a,67bF. Cossutti,67a G. Della Ricca,67a,67bB. Gobbo,67aM. Marone,67a,67b,fD. Montanino,67a,67b,fA. Penzo,67aA. Schizzi,67a,67b S. G. Heo,68T. Y. Kim,68S. K. Nam,68S. Chang,69J. Chung,69D. H. Kim,69G. N. Kim,69D. J. Kong,69H. Park,69 S. R. Ro,69D. C. Son,69T. Son,69J. Y. Kim,70Zero J. Kim,70S. Song,70H. Y. Jo,71S. Choi,72D. Gyun,72B. Hong,72 M. Jo,72H. Kim,72T. J. Kim,72K. S. Lee,72D. H. Moon,72S. K. Park,72M. Choi,73S. Kang,73J. H. Kim,73C. Park,73 I. C. Park,73S. Park,73G. Ryu,73Y. Cho,74Y. Choi,74Y. K. Choi,74J. Goh,74M. S. Kim,74E. Kwon,74B. Lee,74
J. Lee,74S. Lee,74H. Seo,74I. Yu,74M. J. Bilinskas,75I. Grigelionis,75M. Janulis,75A. Juodagalvis,75 H. Castilla-Valdez,76E. De La Cruz-Burelo,76I. Heredia-de La Cruz,76R. Lopez-Fernandez,76R. Magan˜a Villalba,76
J. Martı´nez-Ortega,76A. Sa´nchez-Herna´ndez,76L. M. Villasenor-Cendejas,76S. Carrillo Moreno,77 F. Vazquez Valencia,77H. A. Salazar Ibarguen,78E. Casimiro Linares,79A. Morelos Pineda,79M. A. Reyes-Santos,79
D. Krofcheck,80A. J. Bell,81P. H. Butler,81R. Doesburg,81S. Reucroft,81H. Silverwood,81M. Ahmad,82 M. I. Asghar,82H. R. Hoorani,82S. Khalid,82W. A. Khan,82T. Khurshid,82S. Qazi,82M. A. Shah,82M. Shoaib,82
G. Brona,83K. Bunkowski,83M. Cwiok,83W. Dominik,83K. Doroba,83A. Kalinowski,83M. Konecki,83 J. Krolikowski,83H. Bialkowska,84B. Boimska,84T. Frueboes,84R. Gokieli,84M. Go´rski,84M. Kazana,84
K. Nawrocki,84K. Romanowska-Rybinska,84M. Szleper,84G. Wrochna,84P. Zalewski,84N. Almeida,85 P. Bargassa,85A. David,85P. Faccioli,85P. G. Ferreira Parracho,85M. Gallinaro,85J. Seixas,85J. Varela,85 P. Vischia,85I. Belotelov,86P. Bunin,86M. Gavrilenko,86I. Golutvin,86I. Gorbunov,86A. Kamenev,86V. Karjavin,86
G. Kozlov,86A. Lanev,86A. Malakhov,86P. Moisenz,86V. Palichik,86V. Perelygin,86S. Shmatov,86V. Smirnov,86 A. Volodko,86A. Zarubin,86S. Evstyukhin,87V. Golovtsov,87Y. Ivanov,87V. Kim,87P. Levchenko,87V. Murzin,87 V. Oreshkin,87I. Smirnov,87V. Sulimov,87L. Uvarov,87S. Vavilov,87A. Vorobyev,87An. Vorobyev,87Yu. Andreev,88
A. Dermenev,88S. Gninenko,88N. Golubev,88M. Kirsanov,88N. Krasnikov,88V. Matveev,88A. Pashenkov,88 D. Tlisov,88A. Toropin,88V. Epshteyn,89M. Erofeeva,89V. Gavrilov,89M. Kossov,89,fN. Lychkovskaya,89
V. Popov,89G. Safronov,89S. Semenov,89V. Stolin,89E. Vlasov,89A. Zhokin,89A. Belyaev,90E. Boos,90 M. Dubinin,90,eL. Dudko,90A. Ershov,90A. Gribushin,90V. Klyukhin,90O. Kodolova,90I. Lokhtin,90A. Markina,90
S. Obraztsov,90M. Perfilov,90S. Petrushanko,90A. Popov,90L. Sarycheva,90,aV. Savrin,90A. Snigirev,90 V. Andreev,91M. Azarkin,91I. Dremin,91M. Kirakosyan,91A. Leonidov,91G. Mesyats,91S. V. Rusakov,91 A. Vinogradov,91I. Azhgirey,92I. Bayshev,92S. Bitioukov,92V. Grishin,92,fV. Kachanov,92D. Konstantinov,92 A. Korablev,92V. Krychkine,92V. Petrov,92R. Ryutin,92A. Sobol,92L. Tourtchanovitch,92S. Troshin,92N. Tyurin,92
M. Aguilar-Benitez,94J. Alcaraz Maestre,94P. Arce,94C. Battilana,94E. Calvo,94M. Cerrada,94
M. Chamizo Llatas,94N. Colino,94B. De La Cruz,94A. Delgado Peris,94C. Diez Pardos,94D. Domı´nguez Va´zquez,94 C. Fernandez Bedoya,94J. P. Ferna´ndez Ramos,94A. Ferrando,94J. Flix,94M. C. Fouz,94P. Garcia-Abia,94
O. Gonzalez Lopez,94S. Goy Lopez,94J. M. Hernandez,94M. I. Josa,94G. Merino,94J. Puerta Pelayo,94 A. Quintario Olmeda,94I. Redondo,94L. Romero,94J. Santaolalla,94M. S. Soares,94C. Willmott,94C. Albajar,95 G. Codispoti,95J. F. de Troco´niz,95J. Cuevas,96J. Fernandez Menendez,96S. Folgueras,96I. Gonzalez Caballero,96 L. Lloret Iglesias,96J. Piedra Gomez,96,eeJ. A. Brochero Cifuentes,97I. J. Cabrillo,97A. Calderon,97S. H. Chuang,97
J. Duarte Campderros,97M. Felcini,97,ffM. Fernandez,97G. Gomez,97J. Gonzalez Sanchez,97C. Jorda,97 P. Lobelle Pardo,97A. Lopez Virto,97J. Marco,97R. Marco,97C. Martinez Rivero,97F. Matorras,97 F. J. Munoz Sanchez,97T. Rodrigo,97A. Y. Rodrı´guez-Marrero,97A. Ruiz-Jimeno,97L. Scodellaro,97 M. Sobron Sanudo,97I. Vila,97R. Vilar Cortabitarte,97D. Abbaneo,98E. Auffray,98G. Auzinger,98P. Baillon,98
A. H. Ball,98D. Barney,98C. Bernet,98,gG. Bianchi,98P. Bloch,98A. Bocci,98A. Bonato,98H. Breuker,98 T. Camporesi,98G. Cerminara,98T. Christiansen,98J. A. Coarasa Perez,98D. D’Enterria,98A. Dabrowski,98 A. De Roeck,98S. Di Guida,98M. Dobson,98N. Dupont-Sagorin,98A. Elliott-Peisert,98B. Frisch,98W. Funk,98
G. Georgiou,98M. Giffels,98D. Gigi,98K. Gill,98D. Giordano,98M. Giunta,98F. Glege,98
R. Gomez-Reino Garrido,98P. Govoni,98S. Gowdy,98R. Guida,98M. Hansen,98P. Harris,98C. Hartl,98J. Harvey,98 B. Hegner,98A. Hinzmann,98V. Innocente,98P. Janot,98K. Kaadze,98E. Karavakis,98K. Kousouris,98P. Lecoq,98
Y.-J. Lee,98P. Lenzi,98C. Lourenc¸o,98T. Ma¨ki,98M. Malberti,98L. Malgeri,98M. Mannelli,98L. Masetti,98 F. Meijers,98S. Mersi,98E. Meschi,98R. Moser,98M. U. Mozer,98M. Mulders,98P. Musella,98E. Nesvold,98 T. Orimoto,98L. Orsini,98E. Palencia Cortezon,98E. Perez,98L. Perrozzi,98A. Petrilli,98A. Pfeiffer,98M. Pierini,98
M. Pimia¨,98D. Piparo,98G. Polese,98L. Quertenmont,98A. Racz,98W. Reece,98J. Rodrigues Antunes,98 G. Rolandi,98,ggT. Rommerskirchen,98C. Rovelli,98,hhM. Rovere,98H. Sakulin,98F. Santanastasio,98C. Scha¨fer,98 C. Schwick,98I. Segoni,98S. Sekmen,98A. Sharma,98P. Siegrist,98P. Silva,98M. Simon,98P. Sphicas,98,iiD. Spiga,98
M. Spiropulu,98,eM. Stoye,98A. Tsirou,98G. I. Veres,98,rJ. R. Vlimant,98H. K. Wo¨hri,98S. D. Worm,98,jj W. D. Zeuner,98W. Bertl,99K. Deiters,99W. Erdmann,99K. Gabathuler,99R. Horisberger,99Q. Ingram,99 H. C. Kaestli,99S. Ko¨nig,99D. Kotlinski,99U. Langenegger,99F. Meier,99D. Renker,99T. Rohe,99J. Sibille,99,kk
L. Ba¨ni,100P. Bortignon,100M. A. Buchmann,100B. Casal,100N. Chanon,100A. Deisher,100G. Dissertori,100 M. Dittmar,100M. Du¨nser,100J. Eugster,100K. Freudenreich,100C. Grab,100D. Hits,100P. Lecomte,100 W. Lustermann,100P. Martinez Ruiz del Arbol,100N. Mohr,100F. Moortgat,100C. Na¨geli,100,llP. Nef,100 F. Nessi-Tedaldi,100F. Pandolfi,100L. Pape,100F. Pauss,100M. Peruzzi,100F. J. Ronga,100M. Rossini,100L. Sala,100
A. K. Sanchez,100A. Starodumov,100,mmB. Stieger,100M. Takahashi,100L. Tauscher,100,aA. Thea,100 K. Theofilatos,100D. Treille,100C. Urscheler,100R. Wallny,100H. A. Weber,100L. Wehrli,100E. Aguilo,101
C. Amsler,101V. Chiochia,101S. De Visscher,101C. Favaro,101M. Ivova Rikova,101B. Millan Mejias,101 P. Otiougova,101P. Robmann,101H. Snoek,101S. Tupputi,101M. Verzetti,101Y. H. Chang,102K. H. Chen,102 C. M. Kuo,102S. W. Li,102W. Lin,102Z. K. Liu,102Y. J. Lu,102D. Mekterovic,102A. P. Singh,102R. Volpe,102 S. S. Yu,102P. Bartalini,103P. Chang,103Y. H. Chang,103Y. W. Chang,103Y. Chao,103K. F. Chen,103C. Dietz,103 U. Grundler,103W.-S. Hou,103Y. Hsiung,103K. Y. Kao,103Y. J. Lei,103R.-S. Lu,103D. Majumder,103E. Petrakou,103 X. Shi,103J. G. Shiu,103Y. M. Tzeng,103X. Wan,103M. Wang,103A. Adiguzel,104M. N. Bakirci,104,nnS. Cerci,104,oo C. Dozen,104I. Dumanoglu,104E. Eskut,104S. Girgis,104G. Gokbulut,104E. Gurpinar,104I. Hos,104E. E. Kangal,104 G. Karapinar,104A. Kayis Topaksu,104G. Onengut,104K. Ozdemir,104S. Ozturk,104,ppA. Polatoz,104K. Sogut,104,qq
D. Sunar Cerci,104,ooB. Tali,104,ooH. Topakli,104,nnL. N. Vergili,104M. Vergili,104I. V. Akin,105T. Aliev,105 B. Bilin,105S. Bilmis,105M. Deniz,105H. Gamsizkan,105A. M. Guler,105K. Ocalan,105A. Ozpineci,105M. Serin,105 R. Sever,105U. E. Surat,105M. Yalvac,105E. Yildirim,105M. Zeyrek,105E. Gu¨lmez,106B. Isildak,106,rrM. Kaya,106,ss O. Kaya,106,ssS. Ozkorucuklu,106,ttN. Sonmez,106,uuK. Cankocak,107L. Levchuk,108F. Bostock,109J. J. Brooke,109
E. Clement,109D. Cussans,109H. Flacher,109R. Frazier,109J. Goldstein,109M. Grimes,109G. P. Heath,109 H. F. Heath,109L. Kreczko,109S. Metson,109D. M. Newbold,109,jjK. Nirunpong,109A. Poll,109S. Senkin,109
V. J. Smith,109T. Williams,109L. Basso,110,vvK. W. Bell,110A. Belyaev,110,vvC. Brew,110R. M. Brown,110 D. J. A. Cockerill,110J. A. Coughlan,110K. Harder,110S. Harper,110J. Jackson,110B. W. Kennedy,110E. Olaiya,110
D. Petyt,110B. C. Radburn-Smith,110C. H. Shepherd-Themistocleous,110I. R. Tomalin,110W. J. Womersley,110 R. Bainbridge,111G. Ball,111R. Beuselinck,111O. Buchmuller,111D. Colling,111N. Cripps,111M. Cutajar,111
P. Dauncey,111G. Davies,111M. Della Negra,111W. Ferguson,111J. Fulcher,111D. Futyan,111A. Gilbert,111
A. Guneratne Bryer,111G. Hall,111Z. Hatherell,111J. Hays,111G. Iles,111M. Jarvis,111G. Karapostoli,111 L. Lyons,111A.-M. Magnan,111J. Marrouche,111B. Mathias,111R. Nandi,111J. Nash,111A. Nikitenko,111,mm A. Papageorgiou,111J. Pela,111,fM. Pesaresi,111K. Petridis,111M. Pioppi,111,wwD. M. Raymond,111S. Rogerson,111 A. Rose,111M. J. Ryan,111C. Seez,111P. Sharp,111,aA. Sparrow,111A. Tapper,111M. Vazquez Acosta,111T. Virdee,111
S. Wakefield,111N. Wardle,111T. Whyntie,111M. Chadwick,112J. E. Cole,112P. R. Hobson,112A. Khan,112 P. Kyberd,112D. Leslie,112W. Martin,112I. D. Reid,112P. Symonds,112L. Teodorescu,112M. Turner,112 K. Hatakeyama,113H. Liu,113T. Scarborough,113C. Henderson,114P. Rumerio,114A. Avetisyan,115T. Bose,115
C. Fantasia,115A. Heister,115J. St. John,115P. Lawson,115D. Lazic,115J. Rohlf,115D. Sperka,115L. Sulak,115 J. Alimena,116S. Bhattacharya,116D. Cutts,116A. Ferapontov,116U. Heintz,116S. Jabeen,116G. Kukartsev,116 E. Laird,116G. Landsberg,116M. Luk,116M. Narain,116D. Nguyen,116M. Segala,116T. Sinthuprasith,116T. Speer,116
K. V. Tsang,116R. Breedon,117G. Breto,117M. Calderon De La Barca Sanchez,117S. Chauhan,117M. Chertok,117 J. Conway,117R. Conway,117P. T. Cox,117J. Dolen,117R. Erbacher,117M. Gardner,117R. Houtz,117W. Ko,117 A. Kopecky,117R. Lander,117O. Mall,117T. Miceli,117R. Nelson,117D. Pellett,117B. Rutherford,117M. Searle,117
J. Smith,117M. Squires,117M. Tripathi,117R. Vasquez Sierra,117V. Andreev,118D. Cline,118R. Cousins,118 J. Duris,118S. Erhan,118P. Everaerts,118C. Farrell,118J. Hauser,118M. Ignatenko,118C. Plager,118G. Rakness,118
P. Schlein,118,aJ. Tucker,118V. Valuev,118M. Weber,118J. Babb,119R. Clare,119M. E. Dinardo,119J. Ellison,119 J. W. Gary,119F. Giordano,119G. Hanson,119G. Y. Jeng,119,xxH. Liu,119O. R. Long,119A. Luthra,119H. Nguyen,119
S. Paramesvaran,119J. Sturdy,119S. Sumowidagdo,119R. Wilken,119S. Wimpenny,119W. Andrews,120 J. G. Branson,120G. B. Cerati,120S. Cittolin,120D. Evans,120F. Golf,120A. Holzner,120R. Kelley,120 M. Lebourgeois,120J. Letts,120I. Macneill,120B. Mangano,120S. Padhi,120C. Palmer,120G. Petrucciani,120
M. Pieri,120M. Sani,120V. Sharma,120S. Simon,120E. Sudano,120M. Tadel,120Y. Tu,120A. Vartak,120 S. Wasserbaech,120,yyF. Wu¨rthwein,120A. Yagil,120J. Yoo,120D. Barge,121R. Bellan,121C. Campagnari,121 M. D’Alfonso,121T. Danielson,121K. Flowers,121P. Geffert,121J. Incandela,121C. Justus,121P. Kalavase,121 S. A. Koay,121D. Kovalskyi,121V. Krutelyov,121S. Lowette,121N. Mccoll,121V. Pavlunin,121F. Rebassoo,121 J. Ribnik,121J. Richman,121R. Rossin,121D. Stuart,121W. To,121C. West,121A. Apresyan,122A. Bornheim,122 Y. Chen,122E. Di Marco,122J. Duarte,122M. Gataullin,122Y. Ma,122A. Mott,122H. B. Newman,122C. Rogan,122 V. Timciuc,122P. Traczyk,122J. Veverka,122R. Wilkinson,122Y. Yang,122R. Y. Zhu,122B. Akgun,123R. Carroll,123 T. Ferguson,123Y. Iiyama,123D. W. Jang,123Y. F. Liu,123M. Paulini,123H. Vogel,123I. Vorobiev,123J. P. Cumalat,124 B. R. Drell,124C. J. Edelmaier,124W. T. Ford,124A. Gaz,124B. Heyburn,124E. Luiggi Lopez,124J. G. Smith,124 K. Stenson,124K. A. Ulmer,124S. R. Wagner,124J. Alexander,125A. Chatterjee,125N. Eggert,125L. K. Gibbons,125
B. Heltsley,125A. Khukhunaishvili,125B. Kreis,125N. Mirman,125G. Nicolas Kaufman,125J. R. Patterson,125 A. Ryd,125E. Salvati,125W. Sun,125W. D. Teo,125J. Thom,125J. Thompson,125J. Vaughan,125Y. Weng,125 L. Winstrom,125P. Wittich,125D. Winn,126S. Abdullin,127M. Albrow,127J. Anderson,127L. A. T. Bauerdick,127
A. Beretvas,127J. Berryhill,127P. C. Bhat,127I. Bloch,127K. Burkett,127J. N. Butler,127V. Chetluru,127 H. W. K. Cheung,127F. Chlebana,127V. D. Elvira,127I. Fisk,127J. Freeman,127Y. Gao,127D. Green,127O. Gutsche,127
J. Hanlon,127R. M. Harris,127J. Hirschauer,127B. Hooberman,127S. Jindariani,127M. Johnson,127U. Joshi,127 B. Kilminster,127B. Klima,127S. Kunori,127S. Kwan,127C. Leonidopoulos,127D. Lincoln,127R. Lipton,127 J. Lykken,127K. Maeshima,127J. M. Marraffino,127S. Maruyama,127D. Mason,127P. McBride,127K. Mishra,127
S. Mrenna,127Y. Musienko,127,zzC. Newman-Holmes,127V. O’Dell,127O. Prokofyev,127E. Sexton-Kennedy,127 S. Sharma,127W. J. Spalding,127L. Spiegel,127P. Tan,127L. Taylor,127S. Tkaczyk,127N. V. Tran,127L. Uplegger,127 E. W. Vaandering,127R. Vidal,127J. Whitmore,127W. Wu,127F. Yang,127F. Yumiceva,127J. C. Yun,127D. Acosta,128
P. Avery,128D. Bourilkov,128M. Chen,128S. Das,128M. De Gruttola,128G. P. Di Giovanni,128D. Dobur,128 A. Drozdetskiy,128R. D. Field,128M. Fisher,128Y. Fu,128I. K. Furic,128J. Gartner,128J. Hugon,128B. Kim,128
J. Konigsberg,128A. Korytov,128A. Kropivnitskaya,128T. Kypreos,128J. F. Low,128K. Matchev,128 P. Milenovic,128,aaaG. Mitselmakher,128L. Muniz,128R. Remington,128A. Rinkevicius,128P. Sellers,128 N. Skhirtladze,128M. Snowball,128J. Yelton,128M. Zakaria,128V. Gaultney,129L. M. Lebolo,129S. Linn,129 P. Markowitz,129G. Martinez,129J. L. Rodriguez,129T. Adams,130A. Askew,130J. Bochenek,130J. Chen,130 B. Diamond,130S. V. Gleyzer,130J. Haas,130S. Hagopian,130V. Hagopian,130M. Jenkins,130K. F. Johnson,130
H. Prosper,130V. Veeraraghavan,130M. Weinberg,130M. M. Baarmand,131B. Dorney,131M. Hohlmann,131 H. Kalakhety,131I. Vodopiyanov,131M. R. Adams,132I. M. Anghel,132L. Apanasevich,132Y. Bai,132 V. E. Bazterra,132R. R. Betts,132I. Bucinskaite,132J. Callner,132R. Cavanaugh,132C. Dragoiu,132O. Evdokimov,132
L. Gauthier,132C. E. Gerber,132D. J. Hofman,132S. Khalatyan,132F. Lacroix,132M. Malek,132C. O’Brien,132 C. Silkworth,132D. Strom,132N. Varelas,132U. Akgun,133E. A. Albayrak,133B. Bilki,133,bbbW. Clarida,133 F. Duru,133S. Griffiths,133J.-P. Merlo,133H. Mermerkaya,133,cccA. Mestvirishvili,133A. Moeller,133J. Nachtman,133 C. R. Newsom,133E. Norbeck,133Y. Onel,133F. Ozok,133S. Sen,133E. Tiras,133J. Wetzel,133T. Yetkin,133K. Yi,133 B. A. Barnett,134B. Blumenfeld,134S. Bolognesi,134D. Fehling,134G. Giurgiu,134A. V. Gritsan,134Z. J. Guo,134
G. Hu,134P. Maksimovic,134S. Rappoccio,134M. Swartz,134A. Whitbeck,134P. Baringer,135A. Bean,135 G. Benelli,135O. Grachov,135R. P. Kenny Iii,135M. Murray,135D. Noonan,135S. Sanders,135R. Stringer,135 G. Tinti,135J. S. Wood,135V. Zhukova,135A. F. Barfuss,136T. Bolton,136I. Chakaberia,136A. Ivanov,136S. Khalil,136
M. Makouski,136Y. Maravin,136S. Shrestha,136I. Svintradze,136J. Gronberg,137D. Lange,137D. Wright,137 A. Baden,138M. Boutemeur,138B. Calvert,138S. C. Eno,138J. A. Gomez,138N. J. Hadley,138R. G. Kellogg,138
M. Kirn,138T. Kolberg,138Y. Lu,138M. Marionneau,138A. C. Mignerey,138A. Peterman,138A. Skuja,138 J. Temple,138M. B. Tonjes,138S. C. Tonwar,138E. Twedt,138G. Bauer,139J. Bendavid,139W. Busza,139E. Butz,139
I. A. Cali,139M. Chan,139V. Dutta,139G. Gomez Ceballos,139M. Goncharov,139K. A. Hahn,139Y. Kim,139 M. Klute,139K. Krajczar,139,dddW. Li,139P. D. Luckey,139T. Ma,139S. Nahn,139C. Paus,139D. Ralph,139 C. Roland,139G. Roland,139M. Rudolph,139G. S. F. Stephans,139F. Sto¨ckli,139K. Sumorok,139K. Sung,139 D. Velicanu,139E. A. Wenger,139R. Wolf,139B. Wyslouch,139S. Xie,139M. Yang,139Y. Yilmaz,139A. S. Yoon,139
M. Zanetti,139S. I. Cooper,140B. Dahmes,140A. De Benedetti,140G. Franzoni,140A. Gude,140S. C. Kao,140 K. Klapoetke,140Y. Kubota,140J. Mans,140N. Pastika,140R. Rusack,140M. Sasseville,140A. Singovsky,140 N. Tambe,140J. Turkewitz,140L. M. Cremaldi,141R. Kroeger,141L. Perera,141R. Rahmat,141D. A. Sanders,141 E. Avdeeva,142K. Bloom,142S. Bose,142J. Butt,142D. R. Claes,142A. Dominguez,142M. Eads,142J. Keller,142 I. Kravchenko,142J. Lazo-Flores,142H. Malbouisson,142S. Malik,142G. R. Snow,142U. Baur,143A. Godshalk,143
I. Iashvili,143S. Jain,143A. Kharchilava,143A. Kumar,143S. P. Shipkowski,143K. Smith,143G. Alverson,144 E. Barberis,144D. Baumgartel,144M. Chasco,144J. Haley,144D. Nash,144D. Trocino,144D. Wood,144J. Zhang,144
A. Anastassov,145A. Kubik,145N. Mucia,145N. Odell,145R. A. Ofierzynski,145B. Pollack,145A. Pozdnyakov,145 M. Schmitt,145S. Stoynev,145M. Velasco,145S. Won,145L. Antonelli,146D. Berry,146A. Brinkerhoff,146 M. Hildreth,146C. Jessop,146D. J. Karmgard,146J. Kolb,146K. Lannon,146W. Luo,146S. Lynch,146N. Marinelli,146 D. M. Morse,146T. Pearson,146R. Ruchti,146J. Slaunwhite,146N. Valls,146M. Wayne,146M. Wolf,146B. Bylsma,147 L. S. Durkin,147C. Hill,147R. Hughes,147K. Kotov,147T. Y. Ling,147D. Puigh,147M. Rodenburg,147C. Vuosalo,147 G. Williams,147B. L. Winer,147N. Adam,148E. Berry,148P. Elmer,148D. Gerbaudo,148V. Halyo,148P. Hebda,148
J. Hegeman,148A. Hunt,148P. Jindal,148D. Lopes Pegna,148P. Lujan,148D. Marlow,148T. Medvedeva,148 M. Mooney,148J. Olsen,148P. Piroue´,148X. Quan,148A. Raval,148H. Saka,148D. Stickland,148C. Tully,148 J. S. Werner,148A. Zuranski,148J. G. Acosta,149E. Brownson,149X. T. Huang,149A. Lopez,149H. Mendez,149
S. Oliveros,149J. E. Ramirez Vargas,149A. Zatserklyaniy,149E. Alagoz,150V. E. Barnes,150D. Benedetti,150 G. Bolla,150D. Bortoletto,150M. De Mattia,150A. Everett,150Z. Hu,150M. Jones,150O. Koybasi,150M. Kress,150 A. T. Laasanen,150N. Leonardo,150V. Maroussov,150P. Merkel,150D. H. Miller,150N. Neumeister,150I. Shipsey,150 D. Silvers,150A. Svyatkovskiy,150M. Vidal Marono,150H. D. Yoo,150J. Zablocki,150Y. Zheng,150S. Guragain,151 N. Parashar,151A. Adair,152C. Boulahouache,152K. M. Ecklund,152F. J. M. Geurts,152B. P. Padley,152R. Redjimi,152
J. Roberts,152J. Zabel,152B. Betchart,153A. Bodek,153Y. S. Chung,153R. Covarelli,153P. de Barbaro,153 R. Demina,153Y. Eshaq,153A. Garcia-Bellido,153P. Goldenzweig,153J. Han,153A. Harel,153D. C. Miner,153 D. Vishnevskiy,153M. Zielinski,153A. Bhatti,154R. Ciesielski,154L. Demortier,154K. Goulianos,154G. Lungu,154
S. Malik,154C. Mesropian,154S. Arora,155A. Barker,155J. P. Chou,155C. Contreras-Campana,155 E. Contreras-Campana,155D. Duggan,155D. Ferencek,155Y. Gershtein,155R. Gray,155E. Halkiadakis,155 D. Hidas,155A. Lath,155S. Panwalkar,155M. Park,155R. Patel,155V. Rekovic,155J. Robles,155K. Rose,155S. Salur,155
S. Schnetzer,155C. Seitz,155S. Somalwar,155R. Stone,155S. Thomas,155G. Cerizza,156M. Hollingsworth,156 S. Spanier,156Z. C. Yang,156A. York,156R. Eusebi,157W. Flanagan,157J. Gilmore,157T. Kamon,157,eee V. Khotilovich,157R. Montalvo,157I. Osipenkov,157Y. Pakhotin,157A. Perloff,157J. Roe,157A. Safonov,157
T. Sakuma,157S. Sengupta,157I. Suarez,157A. Tatarinov,157D. Toback,157N. Akchurin,158J. Damgov,158 P. R. Dudero,158C. Jeong,158K. Kovitanggoon,158S. W. Lee,158T. Libeiro,158Y. Roh,158I. Volobouev,158 E. Appelt,159C. Florez,159S. Greene,159A. Gurrola,159W. Johns,159C. Johnston,159P. Kurt,159C. Maguire,159 A. Melo,159P. Sheldon,159B. Snook,159S. Tuo,159J. Velkovska,159M. W. Arenton,160M. Balazs,160S. Boutle,160
B. Cox,160B. Francis,160J. Goodell,160R. Hirosky,160A. Ledovskoy,160C. Lin,160C. Neu,160J. Wood,160
R. Yohay,160S. Gollapinni,161R. Harr,161P. E. Karchin,161C. Kottachchi Kankanamge Don,161P. Lamichhane,161 A. Sakharov,161M. Anderson,162M. Bachtis,162D. Belknap,162L. Borrello,162D. Carlsmith,162M. Cepeda,162 S. Dasu,162L. Gray,162K. S. Grogg,162M. Grothe,162R. Hall-Wilton,162M. Herndon,162A. Herve´,162P. Klabbers,162
J. Klukas,162A. Lanaro,162C. Lazaridis,162J. Leonard,162R. Loveless,162A. Mohapatra,162I. Ojalvo,162 F. Palmonari,162G. A. Pierro,162I. Ross,162A. Savin,162W. H. Smith,162and J. Swanson162
(CMS Collaboration)
1Yerevan Physics Institute, Yerevan, Armenia 2Institut fu¨r Hochenergiephysik der OeAW, Wien, Austria 3National Centre for Particle and High Energy Physics, Minsk, Belarus
4Universiteit Antwerpen, Antwerpen, Belgium 5Vrije Universiteit Brussel, Brussel, Belgium 6Universite´ Libre de Bruxelles, Bruxelles, Belgium
7
Ghent University, Ghent, Belgium
8Universite´ Catholique de Louvain, Louvain-la-Neuve, Belgium 9Universite´ de Mons, Mons, Belgium
10Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil 11Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil 12Instituto de Fisica Teorica, Universidade Estadual Paulista, Sao Paulo, Brazil
13Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria 14University of Sofia, Sofia, Bulgaria
15Institute of High Energy Physics, Beijing, China
16State Key Lab. of Nucl. Phys. and Tech., Peking University, Beijing, China 17Universidad de Los Andes, Bogota, Colombia
18Technical University of Split, Split, Croatia 19University of Split, Split, Croatia 20Institute Rudjer Boskovic, Zagreb, Croatia
21University of Cyprus, Nicosia, Cyprus 22Charles University, Prague, Czech Republic 23
Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
24National Institute of Chemical Physics and Biophysics, Tallinn, Estonia 25Department of Physics, University of Helsinki, Helsinki, Finland
26Helsinki Institute of Physics, Helsinki, Finland 27Lappeenranta University of Technology, Lappeenranta, Finland
28DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France
29Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France
30Institut Pluridisciplinaire Hubert Curien, Universite´ de Strasbourg, Universite´ de Haute Alsace Mulhouse,
CNRS/IN2P3, Strasbourg, France
31Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules (IN2P3), Villeurbanne, France 32Universite´ de Lyon, Universite´ Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucle´aire de Lyon, Villeurbanne, France
33Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia 34RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
35RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany 36RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
37
Deutsches Elektronen-Synchrotron, Hamburg, Germany
38University of Hamburg, Hamburg, Germany 39Institut fu¨r Experimentelle Kernphysik, Karlsruhe, Germany 40Institute of Nuclear Physics ‘‘Demokritos’’, Aghia Paraskevi, Greece
41University of Athens, Athens, Greece 42University of Ioa´nnina, Ioa´nnina, Greece
43KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary 44Institute of Nuclear Research ATOMKI, Debrecen, Hungary
45University of Debrecen, Debrecen, Hungary 46
Panjab University, Chandigarh, India
47University of Delhi, Delhi, India 48Saha Institute of Nuclear Physics, Kolkata, India
50Tata Institute of Fundamental Research—EHEP, Mumbai, India 51Tata Institute of Fundamental Research—HECR, Mumbai, India 52Institute for Research in Fundamental Sciences (IPM), Tehran, Iran 53INFN Sezione di Bari, Universita` di Bari, Politecnico di Bari, Bari, Italy
53aINFN Sezione di Bari 53bUniversita` di Bari 53cPolitecnico di Bari
54INFN Sezione di Bologna, Universita` di Bologna, Bologna, Italy 54a
INFN Sezione di Bologna
54bUniversita` di Bologna
55INFN Sezione di Catania, Universita` di Catania, Catania, Italy 55aINFN Sezione di Catania
55bUniversita` di Catania
56INFN Sezione di Firenze, Universita` di Firenze, Firenze, Italy 56aINFN Sezione di Firenze
56bUniversita` di Firenze
57INFN Laboratori Nazionali di Frascati, Frascati, Italy 58INFN Sezione di Genova, Genova, Italy
59INFN Sezione di Milano-Bicocca, Universita` di Milano-Bicocca, Milano, Italy 59aINFN Sezione di Milano-Bicocca
59bUniversita` di Milano-Bicocca
60INFN Sezione di Napoli, Universita` di Napoli ‘‘Federico II’’, Napoli, Italy 60aINFN Sezione di Napoli
60bUniversita` di Napoli ‘‘Federico II’’ 61
INFN Sezione di Padova, Universita` di Padova, Universita` di Trento (Trento), Padova, Italy
61aINFN Sezione di Padova 61bUniversita` di Padova 61cUniversita` di Trento (Trento)
62INFN Sezione di Pavia, Universita` di Pavia, Pavia, Italy 62aINFN Sezione di Pavia
62bUniversita` di Pavia
63INFN Sezione di Perugia, Universita` di Perugia, Perugia, Italy 63aINFN Sezione di Perugia
63bUniversita` di Perugia
64INFN Sezione di Pisa, Universita` di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy 64aINFN Sezione di Pisa
64bUniversita` di Pisa 64cScuola Normale Superiore di Pisa
65INFN Sezione di Roma, Universita` di Roma ‘‘La Sapienza’’, Roma, Italy 65aINFN Sezione di Roma
65bUniversita` di Roma ‘‘La Sapienza’’
66INFN Sezione di Torino, Universita` di Torino, Universita` del Piemonte Orientale (Novara), Torino, Italy 66aINFN Sezione di Torino
66bUniversita` di Torino
66cUniversita` del Piemonte Orientale (Novara) 67INFN Sezione di Trieste, Universita` di Trieste, Trieste, Italy
67aINFN Sezione di Trieste 67b
Universita` di Trieste
68Kangwon National University, Chunchon, Korea 69Kyungpook National University, Daegu, Korea
70Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea 71Konkuk University, Seoul, Korea
72Korea University, Seoul, Korea 73University of Seoul, Seoul, Korea 74Sungkyunkwan University, Suwon, Korea
75Vilnius University, Vilnius, Lithuania 76
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
77Universidad Iberoamericana, Mexico City, Mexico 78Benemerita Universidad Autonoma de Puebla, Puebla, Mexico 79Universidad Auto´noma de San Luis Potosı´, San Luis Potosı´, Mexico
80University of Auckland, Auckland, New Zealand
81University of Canterbury, Christchurch, New Zealand
82National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan 83Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
84Soltan Institute for Nuclear Studies, Warsaw, Poland
85Laborato´rio de Instrumentac¸a˜o e Fı´sica Experimental de Partı´culas, Lisboa, Portugal 86Joint Institute for Nuclear Research, Dubna, Russia
87Petersburg Nuclear Physics Institute, Gatchina (St Petersburg), Russia 88Institute for Nuclear Research, Moscow, Russia
89
Institute for Theoretical and Experimental Physics, Moscow, Russia
90Moscow State University, Moscow, Russia 91P. N. Lebedev Physical Institute, Moscow, Russia
92State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia 93University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia
94Centro de Investigaciones Energe´ticas Medioambientales y Tecnolo´gicas (CIEMAT), Madrid, Spain 95Universidad Auto´noma de Madrid, Madrid, Spain
96Universidad de Oviedo, Oviedo, Spain
97Instituto de Fı´sica de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain 98CERN, European Organization for Nuclear Research, Geneva, Switzerland
99Paul Scherrer Institut, Villigen, Switzerland
100Institute for Particle Physics, ETH Zurich, Zurich, Switzerland 101Universita¨t Zu¨rich, Zurich, Switzerland
102National Central University, Chung-Li, Taiwan 103National Taiwan University (NTU), Taipei, Taiwan
104Cukurova University, Adana, Turkey 105
Middle East Technical University, Physics Department, Ankara, Turkey
106Bogazici University, Istanbul, Turkey 107Istanbul Technical University, Istanbul, Turkey
108National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine 109University of Bristol, Bristol, United Kingdom
110Rutherford Appleton Laboratory, Didcot, United Kingdom 111Imperial College, London, United Kingdom 112Brunel University, Uxbridge, United Kingdom
113Baylor University, Waco, Texas, USA
114The University of Alabama, Tuscaloosa, Alabama, USA 115Boston University, Boston, Massachusetts, USA 116Brown University, Providence, Rhode Island, USA 117University of California, Davis, Davis, California, USA 118University of California, Los Angeles, Los Angeles, California, USA
119University of California, Riverside, Riverside, California, USA 120University of California, San Diego, La Jolla, California, USA 121University of California, Santa Barbara, Santa Barbara, California, USA
122California Institute of Technology, Pasadena, California, USA 123Carnegie Mellon University, Pittsburgh, Pennsylvania, USA 124University of Colorado at Boulder, Boulder, Colorado, USA
125Cornell University, Ithaca, New York, USA 126Fairfield University, Fairfield, Connecticut, USA 127Fermi National Accelerator Laboratory, Batavia, Illinois, USA
128
University of Florida, Gainesville, Florida, USA
129Florida International University, Miami, Florida, USA 130Florida State University, Tallahassee, Florida, USA 131Florida Institute of Technology, Melbourne, Florida, USA 132University of Illinois at Chicago (UIC), Chicago, Illinois, USA
133The University of Iowa, Iowa City, Iowa, USA 134Johns Hopkins University, Baltimore, Maryland, USA
135The University of Kansas, Lawrence, Kansas, USA 136Kansas State University, Manhattan, Kansas, USA 137
Lawrence Livermore National Laboratory, Livermore, California, USA
138University of Maryland, College Park, Maryland, USA 139Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
140University of Minnesota, Minneapolis, Minnesota, USA 141University of Mississippi, University, Mississippi, USA
142University of Nebraska-Lincoln, Lincoln, Nebraska, USA 143State University of New York at Buffalo, Buffalo, New York USA
144Northeastern University, Boston, Massachusetts, USA 145Northwestern University, Evanston, Illinois, USA 146University of Notre Dame, Notre Dame, Indiana, USA
147The Ohio State University, Columbus, Ohio, USA 148Princeton University, Princeton, New Jersey, USA
149University of Puerto Rico, Mayaguez, USA 150
Purdue University, West Lafayette, Indiana, USA
151Purdue University Calumet, Hammond, Indiana, USA 152Rice University, Houston, Texas, USA 153University of Rochester, Rochester, New York, USA 154The Rockefeller University, New York, New York, USA
155Rutgers, the State University of New Jersey, Piscataway, New York, USA 156University of Tennessee, Knoxville, Tennessee, USA
157Texas A&M University, College Station, Texas, USA 158Texas Tech University, Lubbock, Texas, USA 159Vanderbilt University, Nashville, Tennessee, USA 160University of Virginia, Charlottesville, Virginia, USA
161Wayne State University, Detroit, Michigan, USA 162University of Wisconsin, Madison, Wisconsin, USA
aDeceased. b
Also at Vienna University of Technology, Vienna, Austria.
cAlso at National Institute of Chemical Physics and Biophysics, Tallinn, Estonia. dAlso at Universidade Federal do ABC, Santo Andre, Brazil.
eAlso at California Institute of Technology, Pasadena, California, USA.
fAlso at CERN, European Organization for Nuclear Research, Geneva, Switzerland.
gAlso at Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France. hAlso at Suez Canal University, Suez, Egypt.
iAlso at Zewail City of Science and Technology, Zewail, Egypt. jAlso at Cairo University, Cairo, Egypt.
kAlso at Fayoum University, El-Fayoum, Egypt. lAlso at Ain Shams University, Cairo, Egypt.
mAlso at Soltan Institute for Nuclear Studies, Warsaw, Poland. nAlso at Universite´ de Haute-Alsace, Mulhouse, France. oAlso at Moscow State University, Moscow, Russia.
pAlso at Brandenburg University of Technology, Cottbus, Germany. q
Also at Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
rAlso at Eo¨tvo¨s Lora´nd University, Budapest, Hungary.
sAlso at Tata Institute of Fundamental Research—HECR, Mumbai, India. tAlso at University of Visva-Bharati, Santiniketan, India.
uAlso at Sharif University of Technology, Tehran, Iran. vAlso at Isfahan University of Technology, Isfahan, Iran. wAlso at Shiraz University, Shiraz, Iran.
xAlso at Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Teheran, Iran. yAlso at Facolta` Ingegneria Universita` di Roma, Roma, Italy.
zAlso at Universita` della Basilicata, Potenza, Italy.
aaAlso at Universita` degli Studi Guglielmo Marconi, Roma, Italy. bbAlso at Universita` degli studi di Siena, Siena, Italy.
ccAlso at University of Bucharest, Faculty of Physics, Bucuresti-Magurele, Romania. ddAlso at Faculty of Physics of University of Belgrade, Belgrade, Serbia.
eeAlso at University of Florida, Gainesville, Florida, USA. ff
Also at University of California, Los Angeles, Los Angeles, California, USA.
ggAlso at Scuola Normale e Sezione dell’ INFN, Pisa, Italy.
hhAlso at INFN Sezione di Roma, Universita` di Roma ‘‘La Sapienza’’, Roma, Italy. iiAlso at University of Athens, Athens, Greece.
jjAlso at Rutherford Appleton Laboratory, Didcot, United Kingdom. kkAlso at The University of Kansas, Lawrence, Kansas, USA.
llAlso at Paul Scherrer Institut, Villigen, Switzerland.
mmAlso at Institute for Theoretical and Experimental Physics, Moscow, Russia. nnAlso at Gaziosmanpasa University, Tokat, Turkey.
ooAlso at Adiyaman University, Adiyaman, Turkey. ppAlso at The University of Iowa, Iowa City, Iowa, USA. qqAlso at Mersin University, Mersin, Turkey.
rrAlso at Ozyegin University, Istanbul, Turkey. ssAlso at Kafkas University, Kars, Turkey.
ttAlso at Suleyman Demirel University, Isparta, Turkey. uuAlso at Ege University, Izmir, Turkey.
vvAlso at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom. wwAlso at INFN Sezione di Perugia, Universita` di Perugia, Perugia, Italy.
xx
Also at University of Sydney, Sydney, Australia.
yyAlso at Utah Valley University, Orem, Utah, USA. zzAlso at Institute for Nuclear Research, Moscow, Russia.
aaaAlso at University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia. bbbAlso at Argonne National Laboratory, Argonne, Illinois, USA.
cccAlso at Erzincan University, Erzincan, Turkey.
dddAlso at KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary. eeeAlso at Kyungpook National University, Daegu, Korea.
