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arXiv · 2501.02782

Topological susceptibility and axion properties in the presence of a strong magnetic field within the three-flavor NJL model

J. P. Carlomagno·D. Gómez Dumm·N. N Scoccola
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Abstract

We analyze the topological susceptibility and the axion properties in the presence of an external uniform magnetic field, considering a three flavor NJL model that includes strong CP violation through a 't Hooft-like flavor mixing term. Both thermal and finite density effects are studied for magnetic fields up to 1 GeV$^2$, and the corresponding phase transitions are analyzed. To capture the inverse magnetic catalysis effect at finite temperatures and densities, a magnetic field-dependent coupling constant is considered. Our analytical and numerical results are compared with those previously obtained from lattice QCD, chiral perturbation theory and other effective models.

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J. P. Carlomagno, D. Gómez Dumm, N. N Scoccola. 2025-01-06. Topological susceptibility and axion properties in the presence of a strong magnetic field within the three-flavor NJL model. https://arxiv.org/abs/2501.02782

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