Cold-Nuclear-Matter Effects on Heavy-Quark Production in d+Au Collisions at root S-NN=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
06/11/2013
06/11/2013
2012
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Resumo |
The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d + Au and p + p collisions at root S-NN = 200 GeV in the transverse-momentum range 0.85 <= p(T)(e) <= 8.5 GeV/c. In central d + Au collisions, the nuclear modification factor R-dA at 1.5 < p(T) < 5 GeV/c displays evidence of enhancement of these electrons, relative to those produced in p + p collisions, and shows that the mass-dependent Cronin enhancement observed at the Relativistic Heavy Ion Collider extends to the heavy D meson family. A comparison with the neutral-pion data suggests that the difference in cold-nuclear-matter effects on light- and heavy-flavor mesons could contribute to the observed differences between the pi(0) and heavy-flavor-electron nuclear modification factors R-AA. DOI: 10.1103/PhysRevLett.109.242301 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 Dean of the College of Arts and Sciences Vanderbilt University (USA) 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 Ministry Education Science and Technology (Korea) Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia) VR and 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 U.S.-Israel Binational Science Foundation |
Identificador |
PHYSICAL REVIEW LETTERS, COLLEGE PK, v. 109, n. 24, supl. 1, Part 1, pp. 11087-11092, DEC 12, 2012 0031-9007 http://www.producao.usp.br/handle/BDPI/42499 10.1103/PhysRevLett.109.242301 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC COLLEGE PK |
Relação |
PHYSICAL REVIEW LETTERS |
Direitos |
openAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #GLUON PLASMA #COLLABORATION #PERSPECTIVE #FÍSICA MULTIDISCIPLINAR #PLASMA GLÚON #PERSPECTIVA #PHYSICS, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |