Systematic study of high $p_{\mathrm{T}}$ hadron production in small collision systems by the PHENIX experiment at RHIC

Abstract

High $p_{\mathrm{T}}$ hadrons in the small systems of $d{/}^3$He+Au and $p$+Al/Au collisions have been measured at the midrapidity ($|\eta |<0.35$) as well as at the forward and backward rapidities ($1.2<|\eta |<2.4$) at $\sqrt{s_{NN}}$=200GeV. A clear system and centrality ordering in the $R_{p/d/\mathrm{HeA}}$ was observed for midrapidity ${\pi }^0$ production. Hadron $R_{\mathrm{cp}}$ as a function of rapidity in forward and backward regions show an opposite trend to what HIJING++ predicted. Together with the difference of $R_{\mathrm{cp}}$ 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.

10 pages, 9 figures, proceedings for the XLVII International Symposium on Multiparticle Dynamics (ISMD2017), Sep 11-15, 2017, in Tlaxcala city, Mexico

References in corpus (6)

• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Quadrupole Anisotropy in Dihadron Azimuthal Correlations in Central $d$$+$Au Collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Centrality Dependence of pi^0 and eta Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions
• Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d$$+$Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV
• Centrality-dependent modification of jet-production rates in deuteron-gold collisions at $\sqrt{s_{NN}}$=200 GeV