Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead–lead collisions at √sNN = 2.76 TeV with the ATLAS detector
Metadatos
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Elsevier
Materia
LHC (Large Hadron Collider) Atlas detector Heavy ions Elliptic flow
Fecha
2012-02-01Referencia bibliográfica
Aad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abi, B., ... & Acharya, B. S. (2012). Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead–lead collisions at sNN= 2.76 TeV with the ATLAS detector. Physics Letters B, 707(3-4), 330-348. [https://doi.org/10.1016/j.physletb.2011.12.056]
Patrocinador
ANPCyT ; YerPhI, Armenia; Australian Research Council; Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; BMWF, Austria; National Council for Scientific and Technological Development (CNPq); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada; NRC, Canada; Canada Foundation for Innovation; CERN; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); Chinese Academy of Sciences; Ministry of Science and Technology, China; National Natural Science Foundation of China; Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government; DNRF, Denmark; Danish Natural Science Research Council; Lundbeckfonden; ARTEMIS; European Union (EU); Centre National de la Recherche Scientifique (CNRS); CEA-DSM/IRFU, France; GNAS, Georgia; Federal Ministry of Education & Research (BMBF); German Research Foundation (DFG); HGF, Germany; Max Planck Society; Alexander von Humboldt Foundation; Greek Ministry of Development-GSRT; Israel Science Foundation; MINERVA, Israel ; German-Israeli Foundation for Scientific Research and Development; DIP, Israel; Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; FOM (The Netherlands) Netherlands Government; Netherlands Organization for Scientific Research (NWO) Netherlands Government; RCN, Norway; Ministry of Science and Higher Education, Poland; GRICES, Portugal; Portuguese Foundation for Science and Technology; MERYS (MECTS), Romania; MES of Russia; ROSATOM; Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MVZT, Slovenia; DST/NRF, South Africa; Spanish Government; SRC, Sweden; Wallenberg Foundation, Sweden; SER, Switzerland; Swiss National Science Foundation (SNSF); Canton of Bern, Switzerland; Canton of Geneva, Switzerland; National Science Council of Taiwan; Ministry of Energy & Natural Resources - Turkey; Royal Society of London; Leverhulme Trust; United States Department of Energy (DOE); National Science Foundation (NSF); ICREA; Science & Technology Facilities Council (STFC) ST/J002798/1 ST/H001026/2 ST/M001431/1 ST/K001361/1 MINOS/MINOS+ ST/I003525/1 ST/I000186/1 ST/J004944/1 ST/K001248/1 ATLAS PP/E000347/1 ST/I005803/1 ST/K00073X/1 ST/K001361/1 ATLAS Upgrades PP/E003699/2 ST/K001264/1 ATLAS PP/E003087/1 ST/K001361/1 LHCb Upgrades ST/M001474/1 ST/K001361/1 ATLAS ST/L000970/1 ATLAS Upgrade ST/L001004/1 ST/K001418/1 ST/H001026/1 GRIDPP ST/I003517/1 ST/K001329/1 ATLAS ST/J004928/1 PP/E003699/1 ST/G502320/1 ST/H001093/1 ST/K001361/1 ST/H001093/2 ST/I006080/1 ST/J005576/1 ST/K001361/1 LHCb ST/H001069/2 ST/K001248/1 ST/L001144/1 ST/K001337/1 ATLAS ST/K003658/1 GRIDPP ST/I003142/1 ATLAS ST/I005803/1 GRIDPP ST/J004928/1 ATLAS Upgrade ST/L000970/1 ST/K003658/1 ST/F007337/1 ST/K001337/1Resumen
This Letter describes the measurement of elliptic flow of charged particles in lead–lead collisions at
√sNN = 2.76 TeV using the ATLAS detector at the Large Hadron Collider (LHC). The results are based on
an integrated luminosity of approximately 7 μb−1. Elliptic flow is measured over a wide region in pseudorapidity, |η| < 2.5, and over a broad range in transverse momentum, 0.5 < pT < 20 GeV. The elliptic flow
parameter v2 is obtained by correlating individual tracks with the event plane measured using energy
deposited in the forward calorimeters. As a function of transverse momentum, v2(pT) reaches a maximum at pT of about 3 GeV, then decreases and becomes weakly dependent on pT above 7–8 GeV. Over
the measured pseudorapidity region, v2 is found to be only weakly dependent on η, with less variation
than observed at lower beam energies. The results are discussed in the context of previous measurements
at lower collision energies, as well as recent results from the LHC