Suppression of away-side jet fragments with respect to the reaction plane in Au plus Au collisions at root s(NN)=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
---|---|
Data(s) |
18/04/2012
18/04/2012
2011
|
Resumo |
Pair correlations between large transverse momentum neutral pion triggers (p(T) = 4-7 GeV/c) and charged hadron partners (p(T) = 3-7 GeV/c) in central (0%-20%) and midcentral (20%-60%) Au + Au collisions at root s(NN) = 200 GeV are presented as a function of trigger orientation with respect to the reaction plane. The particles are at larger momentum than where jet shape modifications have been observed, and the correlations are sensitive to the energy loss of partons traveling through hot densematter. An out-of-plane trigger particle produces only 26 +/- 20% of the away-side pairs that are observed opposite of an in-plane trigger particle for midcentral (20%-60%) collisions. In contrast, near-side jet fragments are consistent with no suppression or dependence on trigger orientation with respect to the reaction plane. These observations are qualitatively consistent with a picture of little near-side parton energy loss either due to surface bias or fluctuations and increased away-side parton energy loss due to a long path through the medium. The away-side suppression as a function of reaction-plane angle is shown to be sensitive to both the energy loss mechanism and the space-time evolution of heavy-ion collisions. Office of Nuclear Physics in the Office of Science of the Department of Energy (DOE) National Science Foundation (NSF) Renaissance Technologies LLC 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 (MEXT), Japan JSPS - Japan Society for the Promotion of Science (Japan) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) and Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) (Brazil) NSFC Natural Science Foundation of China (People's Republic of China) MSMT Ministry of Education, Youth and Sports (Czech Republic) CNRS Centre National de la Recherche Scientifique, CEA Commissariat a l'Energie Atomique (CNRS/IN2P3) Institut National de Physique Nucleaire et de Physique des Particules (France) Ministry of Industry, Science and Tekhnologies BMBF - Bundesministerium fur Bildung und Forschung, Germany (DAAD) Deutscher Akademischer Austausch Dienst, Germany Alexander von Humboldt Stiftung (Germany) OTKA Hungarian National Science Fund OTKA (Hungary) (DAE) Department of Atomic Energy and (DST) Department of Science and Technology, India ISF - Israel Science Foundation (Israel) National Research Foundation (NRF), Korea Ministry Education Science and Technology (MEST), Korea Ministry of Education and Science RAS Russia Academy of Sciences FAAE Federal Agency of Atomic Energy (Russia) VR (Sweden) Wallenberg Foundation (Sweden) CRDF US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union US-Hungarian Fulbright Foundation for Educational Exchange (BSF) US-Israel Binational Science Foundation |
Identificador |
PHYSICAL REVIEW C, v.84, n.2, 2011 0556-2813 http://producao.usp.br/handle/BDPI/16087 10.1103/PhysRevC.84.024904 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review C |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #Physics, Nuclear |
Tipo |
article original article publishedVersion |