Systematic study of high pT hadron production in small collision systems by the PHENIX experiment at RHIC
Brookhaven National Laboratory, Physics Department, Upton, NY 11973-5000, USA.
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Published online: 26 January 2018
High pT hadrons in the small systems of d/3He+Au and p+Al/Au collisions have been measured at the midrapidity (|ƞ| < 0.35) as well as at the forward and backward rapidities (1.2 < |ƞ| < 2.4) at √sNN =200 GeV. A clear system and centrality ordering in the Rp/d/HeA was observed for midrapidity π0 production. Hadron Rcp as a function of rapidity in forward and backward regions show an opposite trend to what HIJING++ predicted. Together with the difference of Rcp in p+Al/Au collisions, the observation can be understood consistently with the measured long-range two-particle correlations, hinting the possible medium creation similar to A+A collisions.
© The Authors, published by EDP Sciences, 2018
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