期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP01(2015)129
关键词
Spontaneous Symmetry Breaking; Renormalization Group; Phase Diagram of QCD
资金
- Special Postdoctoral Research Program of RIKEN
- RIKEN iTHES Project
- JSPS KAKENHI Grants [25887014]
- Grants-in-Aid for Scientific Research [25887014] Funding Source: KAKEN
Thermodynamics of the three-flavor quark-meson model with UA(1) anomaly is studied in the presence of external magnetic fields. The nonperturbative functional renormalization group is employed in order to incorporate quantum and thermal fluctuations beyond the mean-field approximation. We calculate the magnetic susceptibility with proper renormalization and find that the system is diamagnetic in the hadron phase and paramagnetic in the hot plasma phase. The obtained values of the magnetic susceptibility are in reasonable agreement with the data from first-principle lattice QCD. Comparison with the mean-field approximation, the Hadron Resonance Gas model and a free gas with temperature-dependent masses is also made.
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