Isospin splitting of pion elliptic flow in relativistic heavy-ion collisions

Journal Article · 01 November 2019 · Physics Letters B

DOI: https://doi.org/10.1016/j.physletb.2019.135002 · OSTI ID:1570778

Liu, He ^[1]; Wang, Feng-Tao ^[2]; Sun, Kai-Jia ^[3]; Xu, Jun  ^[4]; Ko, Che Ming ^[3]

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1. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics; Univ. of Chinese Academy of Sciences (CAS), Beijing (China); Texas A & M Univ., College Station, TX (United States). Dept. of Physics and Astronomy. Cyclotron Inst.
2. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics; Univ. of Chinese Academy of Sciences (CAS), Beijing (China)
3. Texas A & M Univ., College Station, TX (United States). Dept. of Physics and Astronomy. Cyclotron Inst.
4. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Advanced Research Inst.; Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Applied Physics

Based on the framework of an extended multiphase transport model with mean-field potentials in both the partonic phase and the hadronic phase, we explain the elliptic flow difference between π+ and π- in the beam-energy scan program at the relativistic heavy-ion collider by incorporating the vector-isovector potential for quarks and antiquarks with different flavors or isospins. It is found that the isospin splitting of pion elliptic flow favors a strong vector-isovector interaction, and thus serves as a probe of the quark matter equation of state as well as the QCD phase structure at finite baryon and isospin chemical potentials.

• Research Organization: Texas A & M Univ., College Station, TX (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: SC0015266
• OSTI ID: 1570778
• Alternate ID(s): OSTI ID: 1802721
• Journal Information: Physics Letters B, Vol. 798, Issue C; ISSN 0370-2693
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English