Properties of neutral mesons in a hot and magnetized quark matter: size-dependent effects
arXiv:2109.09593 · doi:10.1103/PhysRevD.105.056010
Abstract
In this work we investigate the combined finite-size and thermomagnetic effects on the properties of neutral mesons in a hot medium, in the context of the Nambu--Jona-Lasinio model. In particular, by using the mean-field approximation and the Schwinger proper time method in a toroidal topology with antiperiodic conditions, we evaluate the chiral phase transition, the constituent quark mass and meson observables like the and meson masses and pion decay constant under the change of the size, temperature, chemical potential and strength of external magnetic field. The results indicate that the observables are strongly affected by the conjoint effects of relevant variables, and the net result will depend on the balance of these competing phenomena.
arXiv comment15 pages; 18 figures. In the second version of the manuscript, we have obtained results with both periodic and antiperiodic boundary conditions; a new Subsection (III.A) has been included with a discussion of the behavior of the critical coupling constant concerning the different boundary conditions; the physical discussion of the results has been enriched
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