Measurements of mass-dependent azimuthal anisotropy in central $p+$Au, $d+$Au, and $^3$He$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV - INSPIRE

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Measurements of mass-dependent azimuthal anisotropy in central $p+$ Au, $d+$ Au, and $^3$ He $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV

PHENIX

Collaboration

Oct 26, 2017

11 pages

Published in:

Phys.Rev.C 97 (2018) 064904

Published: Jun 12, 2018

e-Print:

1710.09736 [nucl-ex]

DOI:

10.1103/PhysRevC.97.064904

Experiments:

BNL-RHIC-PHENIX

View in:

reference search39 citations

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Abstract: (APS)

We present measurements of the transverse-momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|<0.35), in 0%–5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=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 v2(pT) in d+Au and He3+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 pT (<1.5GeV/c), but fail to describe various features at higher pT. In all systems, the v2 values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/nq), which was also seen previously in A+A collisions.

Note:

353 authors, 12 pages, 7 figures, 3 tables. v2 is version accepted for publication in Phys. Rev. C. Data tables are included in the Appendix. Plain text data tables for points plotted in figures for other PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html

fermion number: scaling
quark: constituent
energy: kinetic
angular distribution: anisotropy
hydrodynamics: viscosity
nucleus nucleus: scattering
mass dependence
splitting
transverse momentum dependence
transport theory

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Figures(5)

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