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Title: Measurement of elliptic flow of light nuclei at s N N = 200 , 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV at the BNL Relativistic Heavy Ion Collider

Journal Article · · Physical Review C
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Here we present measurements of second-order azimuthal anisotropy ( v2 ) at midrapidity ( |y| < 1.0 ) for light nuclei d , t , 3He (for $$\sqrt{s}$$$$_{NN}$$ = 200 , 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV) and antinuclei$$\bar{d}$$ ( $$\sqrt{s}$$$$_{NN}$$ = 200 , 62.4, 39, 27, and 19.6 GeV) and 3 ¯¯¯¯¯ He ( $$\sqrt{s}$$$$_{NN}$$ = 200 GeV) in the STAR (Solenoidal Tracker at RHIC) experiment. The v2 for these light nuclei produced in heavy-ion collisions is compared with those for p and $$\bar{p}$$. We observe mass ordering in nuclei v2 ( pT) at low transverse momenta ( pT < 2.0 GeV/c). We also find a centrality dependence of v2 for d and $$\bar{d}$$ . The magnitude of v2 for t and 3He agree within statistical errors. Light-nuclei v2 are compared with predictions from a blast-wave model. Atomic mass number ( A ) scaling of light-nuclei v2 (pT) seems to hold for pT / A < 1.5 GeV/c . Results on light-nuclei v2 from a transport-plus-coalescence model are consistent with the experimental measurements.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Organization:
STAR Collaboration
Grant/Contract Number:
SC0012704
OSTI ID:
1340398
Report Number(s):
BNL--112716-2016-JA; KB0202012
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 94; ISSN PRVCAN; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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