期刊
PHYSICAL REVIEW C
卷 101, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.101.034910
关键词
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资金
- Office of Nuclear Physics in the Office of Science of the Department of Energy (USA)
- National Science Foundation (USA)
- Abilene Christian University Research Council (USA)
- Research Foundation of SUNY (USA)
- College of Arts and Sciences, Vanderbilt University (USA)
- Ministry of Education, Culture, Sports, Science, and Technology (Japan)
- Japan Society for the Promotion of Science (Japan)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Brazil)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Brazil)
- Natural Science Foundation of China (People's Republic of China)
- Croatian Science Foundation (Croatia)
- Ministry of Science and Education (Croatia)
- Ministry of Education, Youth and Sports (Czech Republic)
- Centre National de la Recherche Scientifique (France)
- Commissariat a l'Energie Atomique (France)
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung (Germany)
- Deutscher Akademischer Austausch Dienst (Germany)
- Alexander von Humboldt Stiftung (Germany)
- J. Bolyai Research Scholarship, EFOP (Hungary)
- New National Excellence Program (UNKP), NKFIH (Hungary)
- OTKA (Hungary)
- Department of Atomic Energy (India)
- Department of Science and Technology (India)
- Israel Science Foundation (Israel)
- Basic Science Research Program through NRF - Ministry of Education (Korea)
- SRC(CENuM) Program through NRF - Ministry of Education (Korea)
- Ministry of Science and ICT (Korea)
- Physics Department, Lahore University of Management Sciences (Pakistan)
- Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia)
- VR (Sweden)
- Wallenberg Foundation (Sweden)
- US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union
- Hungarian American Enterprise Scholarship Fund
- US-Hungarian Fulbright Foundation
- US-Israel Binational Science Foundation
The PHENIX experiment has studied nuclear effects in p + Al and p + Au collisions at root S-NN = 200GeV on charged hadron production at forward rapidity (1.4 < eta < 2.4, p-going direction) and backward rapidity (-2.2 < eta < -1.2, A-going direction). Such effects are quantified by measuring nuclear modification factors as a function of transverse momentum and pseudorapidity in various collision multiplicity selections. In central p + Al and p + Au collisions, a suppression (enhancement) is observed at forward (backward) rapidity compared to the binary scaled yields in p + p collisions. The magnitude of enhancement at backward rapidity is larger in p + Au collisions than in p + Al collisions, which have a smaller number of participating nucleons. However, the results at forward rapidity show a similar suppression within uncertainties. The results in the integrated centrality are compared with calculations using nuclear parton distribution functions, which show a reasonable agreement at the forward rapidity but fail to describe the backward rapidity enhancement.
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