Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead-lead collisions at √s NN=2.76 TeV with the ATLAS detector
Entity
UAM. Departamento de Física TeóricaPublisher
CERN; ElsevierDate
2012-04-12Citation
10.1016/j.physletb.2012.02.045
Physics Letters B 710.3 (2012) 363-382
ISSN
0370-2693 (print); 1873-2445 (online)DOI
10.1016/j.physletb.2012.02.045Funded by
We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwideProject
info:eu-repo/grantAgreement/EC/FP7/303482Editor's Version
http://dx.doi.org/10.1016/j.physletb.2012.02.045Subjects
FísicaNote
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMRights
© 2012 CERN
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
The ATLAS experiment at the LHC has measured the centrality dependence of charged particle pseudorapidity distributions over |η| < 2 in lead–lead collisions at a nucleon–nucleon centre-of-mass energy of √ sNN = 2.76 TeV. In order to include particles with transverse momentum as low as 30 MeV, the data were recorded with the central solenoid magnet off. Charged particles were reconstructed with two algorithms (2-point “tracklets” and full tracks) using information from the pixel detector only. The lead–lead collision centrality was characterized by the total transverse energy in the forward calorimeter in the range 3.2 < |η| < 4.9. Measurements are presented of the per-event charged particle pseudorapidity distribution, dNch/dη, and the average charged particle multiplicity in the pseudorapidity interval |η| < 0.5 in several intervals of collision centrality. The results are compared to previous midrapidity measurements at the LHC and RHIC. The variation of the mid-rapidity charged particle yield per colliding nucleon pair with the number of participants is consistent with lower √ sNN results. The shape of the dNch/dη distribution is found to be independent of centrality within the systematic uncertainties of the measurement
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Google Scholar:ATLAS collaboration
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Barreiro, Fernando
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Cantero, J.
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De la Torre, H.
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Del Peso, J.
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Glasman Kuguel, Claudia Beatriz
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Labarga Echeverría, Luis Alfonso
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Lagouri, T.
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March, Luis
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Llorente Merino, J.
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Nebot, Eduardo
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Terrón, J.
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Rodier, Stephane
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