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Article overview
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Spin Polarization and Anomalous Magnetic Moment in a (2 + 1)-flavor Nambu-Jona-Lasinio model in the thermomagnetic background | Yi-Wei Qiu
; Sheng-Qin Feng
; | Date: |
4 Jan 2023 | Abstract: | We investigate the magnetized QCD matter and chiral phase transition in a (2
+ 1)-flavor Nambu--Jona-Lasinio (NJL) model at finite temperature and chemical
potential by comparing the contributions from the tensor spin polarization
(TSP) and anomalous magnetic moment (AMM) of quarks. For light $u$ and $d$
quarks, when TSP and AMM are not considered, the magnetized system is
characterized by magnetic catalysis. The introduction of TSP will further
enhance the magnetic catalytic characteristics. On the other hands, when AMM is
introduced, the phase transition temperature decreases with the magnetic field,
which is the feature of inverse magnetic catalysis. The phase diagram of $u$
and $d$ quarks will change from the crossover phase transition to the first
order phase transition with the increase of magnetic field and chemical
potential when AMM is induced. The phase diagram will not change from the
crossover phase transition to the first order phase transition when TSP is
induced. For the phase diagram of strange $s$ quark, whether TSP or AMM is
induced, the phase diagram will keep a crossover phase transition with the
increase of magnetic field and chemical potential. | Source: | arXiv, 2301.01465 | Services: | Forum | Review | PDF | Favorites |
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