Asymmetric nuclear collisions of p+Al, p+Au, d+Au, and He3+Au at sNN=200 GeV provide an excellent laboratory for understanding particle production, as well as exploring interactions among these particles after their initial creation in the collision. We present measurements of charged hadron production dNch/dη in all such collision systems over a broad pseudorapidity range and as a function of collision multiplicity. A simple wounded quark model is remarkably successful at describing the full data set. We also measure the elliptic flow v2 over a similarly broad pseudorapidity range. These measurements provide key constraints on models of particle emission and their translation into flow.
Bibliographical noteFunding Information:
We thank the staff of the Collider-Accelerator and Physics Departments at Brookhaven National Laboratory and the staff of the other PHENIX participating institutions for their vital contributions. We thank Adam Bzdak and Piotr Bożek for providing theoretical calculations for the suite of collision systems and centralities from the wounded-quark model and hydrodynamical model, respectively. We acknowledge support from the Office of Nuclear Physics in the Office of Science of the Department of Energy, the National Science Foundation, the Abilene Christian University Research Council, the Research Foundation of SUNY, and the Dean of the College of Arts and Sciences, Vanderbilt University (U.S.); from the Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan); from the Conselho Nacional de Desenvolvimento Científico e Tecnológico and Fundação de Amparo à Pesquisa do Estado de São Paulo (Brazil); from the Natural Science Foundation of China (People’s Republic of China); from the Croatian Science Foundation and Ministry of Science and Education (Croatia); from the Ministry of Education, Youth, and Sports (Czech Republic); from the Centre National de la Recherche Scientifique, Commissariat à l’Énergie Atomique, and Institut National de Physique Nucléaire et de Physique des Particules (France); from Bundesministerium für Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany); from the J. Bolyai Research Scholarship, EFOP, the New National Excellence Program (ÚNKP), NKFIH, and OTKA (Hungary); from the Department of Atomic Energy and Department of Science and Technology (India); from the Israel Science Foundation (Israel); from the Basic Science Research Program through NRF of the Ministry of Education (Korea); from the Physics Department, Lahore University of Management Sciences (Pakistan); from the Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia); from the VR and Wallenberg Foundation (Sweden); and from the U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union, the Hungarian American Enterprise Scholarship Fund, the US-Hungarian Fulbright Foundation, and the US-Israel Binational Science Foundation.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)