Journal
PHYSICAL REVIEW D
Volume 83, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.094024
Keywords
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Funding
- JSPS [P09028]
- Grants-in-Aid for Scientific Research [09F09028] Funding Source: KAKEN
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We compute the magnetic susceptibility of the quark condensate and the polarization of quarks at zero temperature and in a uniform magnetic background. Our theoretical framework consists of two chiral models that allow us to treat self-consistently the spontaneous breaking of chiral symmetry: the linear sigma-model coupled to quarks, dubbed quark-meson model, and the Nambu-Jona-Lasinio model. We also perform analytic estimates of the same quantities within the renormalized quark-meson model, both in the regimes of weak and strong fields. Our numerical results are in agreement with the recent literature; moreover, we confirm previous attice findings, related to the saturation of the polarization at large fields.
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