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XU Jun, KO Cheming, LI Feng, SONG Taesoo, LIU He. Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC[J]. Nuclear Physics Review, 2015, 32(2): 146-153. DOI: 10.11804/NuclPhysRev.32.02.146
Citation: XU Jun, KO Cheming, LI Feng, SONG Taesoo, LIU He. Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC[J]. Nuclear Physics Review, 2015, 32(2): 146-153. DOI: 10.11804/NuclPhysRev.32.02.146
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Mean-field Effects on Particle and Antiparticle Elliptic Flows in the Beam-energy Scan Program at RHIC

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  • The elliptic flow splitting between particles and their antiparticles has recently been observed by the STAR Collaboration in the beam-energy scan program at the Relativistic Heavy Ion Collider. In studies based on transport models, we have found that this splitting can be explained by the different mean-field potentials acting on particles and their antiparticles in the produced baryon-rich matter. In particular, we have shown that the experimentally measured relative elliptic flow difference can help constrain the vector coupling constant in the Nambu-Jona-Lasinio model used in describing the partonic stage of heavy-ion collisions. This information is useful for locating the critical point in the QCD phase diagram and thus understanding the phase structure of QCD.
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