Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (2): S20511 doi: 10.13538/j.1001-8042/nst.26.S20511

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2014) • Previous Articles     Next Articles

Flavor-mixing induced by the mismatched vector interactions at finite μI

ZHANG Zhao (张昭) and SU Hai-Peng (苏海鹏)   

  1. School of Mathematics and Physics, North China Electric Power University, Beijing 102206, China
  • Contact: ZHANG Zhao E-mail:zhaozhang@pku.org.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China
    (No. 11275069)

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ZHANG Zhao, and SU Hai-Peng . Flavor-mixing induced by the mismatched vector interactions at finite μI.Nuclear Science and Techniques, 2015, 26(2): S20511     doi: 10.13538/j.1001-8042/nst.26.S20511

Abstract:

The relation between the vector-isoscalar and vector-isovector interactions in the two-flavor Nambu-Jona-
Lasinio (NJL) model is investigated under the different constraints from QCD. We demonstrate that the flavormixing
can be induced by the mismatched vector-isoscalar and vector-isovector interactions at finite baryon
chemical potential μ and isospin chemical potential μI . The e ect of this non-anomaly flavor-mixing on the
possible separate chiral transitions at nonzero μI is studied under the assumption of the e ective restoration
of U(1)A symmetry. We find that for the weak isospin asymmetry, the two separate phase boundaries found
previously can be converted into one only if the vector-isovector coupling gvv is significantly stronger than the
vector-isoscalar one gsv without the axial anomaly.

Key words: Chiral phase transition, QCD critical point, Flavor-mixing, Isospin chemical potential