Deviation from quark number scaling of the anisotropy parameter v(2) of pions, kaons, and protons in Au+Au collisions at root s(NN)=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
05/11/2013
05/11/2013
2012
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Resumo |
Measurements of the anisotropy parameter v(2) of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum p(T), and transverse kinetic energy KET at midrapidity (vertical bar eta vertical bar < 0.35) in Au + Au collisions at root s(N N) = 200 GeV are presented. Pions and protons are identified up to p(T) = 6 GeV/c, and kaons up to p(T) = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX Experiment. The scaling of v(2) with the number of valence quarks (n(q)) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KET/n(q) in noncentral Au + Au collisions (20-60%), but this scaling remains valid in central collisions (0-10%). Office of Nuclear Physics in the Office of Science of the Department of Energy National Science Foundation Abilene Christian University Research Council Research Foundation of SUNY Ministry of Education, Culture, Sports, Science, and Technology Japan Society for the Promotion of Science (Japan) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Brazil) Natural Science Foundation of China (People's Republic of China) Ministry of Education, Youth and Sports (Czech Republic) Centre National de la Recherche Scientifique, Commissariat a l'Energie Atomique Institut National de Physique Nucleaire et de Physique des Particules (France) Bundesministerium fur Bildung und Forschung Deutscher Akademischer Austausch Dienst Alexander von Humboldt Stiftung (Germany) Hungarian National Science Fund OTKA (Hungary) Department of Atomic Energy Department of Science and Technology (India) Israel Science Foundation (Israel) National Research Foundation WCU program of the Ministry Education Science and Technology (Korea) Ministry of Education and Science Russian Academy of Sciences Federal Agency of Atomic Energy (Russia), VR Wallenberg Foundation (Sweden) U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union U.S.Hungarian Fulbright Foundation for Educational Exchange US-Israel Binational Science Foundation |
Identificador |
PHYSICAL REVIEW C, COLLEGE PK, v. 85, n. 6, supl. 1, Part 4, pp. 16-22, 45809, 2012 0556-2813 http://www.producao.usp.br/handle/BDPI/41436 10.1103/PhysRevC.85.064914 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC COLLEGE PK |
Relação |
PHYSICAL REVIEW C |
Direitos |
openAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #RESISTIVE PLATE CHAMBERS #GLUON PLASMA #NUCLEAR COLLISIONS #PHENIX #COLLABORATION #PERSPECTIVE #SPECTRA #MATTER #FLOW #COLISÕES NUCLEARES #FÍSICA NUCLEAR #MATÉRIA #PHYSICS, NUCLEAR |
Tipo |
article original article publishedVersion |