Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

6-2018

Journal or Book Title

Physical Review C

Volume

97

Issue

6

First Page

064904

DOI

10.1103/PhysRevC.97.064904

Abstract

We present measurements of the transverse-momentum dependence of elliptic flow upsilon(2) for identified pions and (anti)protons at midrapidity (vertical bar eta vertical bar < 0.35), in 0%-5% central p + Au and He-3 + Au collisions at ,root s(NN) = 200 GeV. When taken together with previously published measurements in d + Au collisions at root s(NN) = 200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of upsilon(2) (p(T)) in d + Au and He-3 + Au collisions, just as in large nucleus-nucleus (A + A) collisions, and a smaller splitting in p + Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low p(T) (<1.5 GeV/c), but fail to describe various features at higher p(T). In all systems, the upsilon(2) values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/n(q)), which was also seen previously in A + A collisions.

Comments

This article is published as Adare, A., C. Aidala, N. N. Ajitanand, Y. Akiba, M. Alfred, V. Andrieux, N. Apadula et al. "Measurements of mass-dependent azimuthal anisotropy in central p+ Au, d+ Au, and He 3+ Au collisions at s N N= 200 GeV." Physical Review C 97, no. 6 (2018): 064904. DOI: 10.1103/PhysRevC.97.064904. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Included in

Nuclear Commons

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