Abstract
We present measurements of two-particle angular correlations between high-transverse-momentum (2<pT<11 GeV/c) π0 observed at midrapidity (|η|<0.35) and particles produced either at forward (3.1<η<3.9) or backward (-3.7<η<-3.1) rapidity in d+Au and p+p collisions at sNN=200 GeV. The azimuthal angle correlations for particle pairs with this large rapidity gap in the Au-going direction exhibit a characteristic structure that persists up to pT≈6 GeV/c and which strongly depends on collision centrality, which is a similar characteristic to the hydrodynamical particle flow in A+A collisions. The structure is absent in the d-going direction as well as in p+p collisions, in the transverse-momentum range studied. The results indicate that the structure is shifted in the Au-going direction toward more central collisions, similar to the charged-particle pseudorapidity distributions.
| Original language | English |
|---|---|
| Article number | 014912 |
| Journal | Physical Review C |
| Volume | 98 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 26 2018 |
Funding
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 acknowledge support from the Office of Nuclear Physics in the Office of Science of the Department of Energy, the National Science Foundation, Abilene Christian University Research Council, the Research Foundation of SUNY, and Dean of the College of Arts and Sciences, Vanderbilt University (USA); the Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan); Conselho Nacional de Desenvolvimento Cient\u00EDfico e Tecnol\u00F3gico and Funda\u00E7\u00E3o de Amparo \u00E0 Pesquisa do Estado de S\u00E3o Paulo (Brazil); the Natural Science Foundation of China (People's Republic of China); the Croatian Science Foundation and Ministry of Science and Education (Croatia); the Ministry of Education, Youth and Sports (Czech Republic), Centre National de la Recherche Scientifique, Commissariat \u00E0 l'\u00C9nergie Atomique, and Institut National de Physique Nucl\u00E9aire et de Physique des Particules (France); Bundesministerium f\u00FCr Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany); a J. Bolyai Research Scholarship, EFOP, the New National Excellence Program (\u00DANKP), NKFIH, and OTKA (Hungary); the Department of Atomic Energy and Department of Science and Technology (India); the Israel Science Foundation (Israel); the Basic Science Research Program through NRF of the Ministry of Education (Korea); Physics Department, Lahore University of Management Sciences (Pakistan); the Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia); VR and Wallenberg Foundation (Sweden); 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.