Magnetic susceptibility of a strongly interacting thermal medium with 2 + 1 quark flavors

A bstract Thermodynamics of the three-flavor quark-meson model with U A (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. W...

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Bibliographic Details
Published in:The journal of high energy physics 2015-01, Vol.2015 (1), p.1, Article 129
Main Authors: Kamikado, Kazuhiko, Kanazawa, Takuya
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Elementary Particles
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
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Summary:A bstract Thermodynamics of the three-flavor quark-meson model with U A (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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP01(2015)129