Observation of an energy-dependent difference in elliptic flow between particles and antiparticles in relativistic heavy ion collisions.
Journal Article (Journal Article)
Elliptic flow (v(2)) values for identified particles at midrapidity in Au + Au collisions, measured by the STAR experiment in the beam energy scan at RHIC at sqrt[s(NN)] = 7.7-62.4 GeV, are presented. A beam-energy-dependent difference of the values of v(2) between particles and corresponding antiparticles was observed. The difference increases with decreasing beam energy and is larger for baryons compared to mesons. This implies that, at lower energies, particles and antiparticles are not consistent with the universal number-of-constituent-quark scaling of v(2) that was observed at sqrt[s(NN)] = 200 GeV.
Full Text
Duke Authors
Cited Authors
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Published Date
- April 2, 2013
Published In
Volume / Issue
- 110 / 14
Start / End Page
- 142301 -
PubMed ID
- 25166982
Electronic International Standard Serial Number (EISSN)
- 1079-7114
International Standard Serial Number (ISSN)
- 0031-9007
Digital Object Identifier (DOI)
- 10.1103/physrevlett.110.142301
Language
- eng