Beam-energy dependence of the directed flow of deuterons in Au+Au collisions - INSPIRE

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Beam-energy dependence of the directed flow of deuterons in Au+Au collisions

STAR

Collaboration

Jul 9, 2020

8 pages

Published in:

Phys.Rev.C 102 (2020) 4, 044906

Published: Oct 17, 2020

e-Print:

2007.04609 [nucl-ex]

DOI:

10.1103/PhysRevC.102.044906

Experiments:

BNL-RHIC-STAR

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Abstract: (APS)

We present a measurement of the first-order azimuthal anisotropy v1 of deuterons from Au+Au collisions at sNN=7.7, 11.5, 14.5, 19.6, 27, and 39 GeV recorded with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The energy dependence of the v1(y) slope, dv1/dy|y=0, for deuterons, where y is the rapidity, is extracted for semicentral collisions (10%–40% centrality) and compared with that of protons. While the v1(y) slopes of protons are generally negative for sNN>10GeV, those for deuterons are consistent with zero, a strong enhancement of the v1(y) slope of deuterons is seen at the lowest collision energy (the largest baryon density) at sNN=7.7GeV. In addition, we report the transverse momentum dependence of v1 for protons and deuterons. The experimental results are compared with transport and coalescence models.

Relativistic Nuclear Collisions
model: coalescence
baryon: density
angular distribution: anisotropy
deuteron: production
transverse momentum dependence
Brookhaven RHIC Coll
experimental results
energy dependence
heavy ion: scattering

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Figures(6)

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