Quark condensate in a magnetic field
I. A. Shushpanov, A. V. Smilga
Abstract
We study the dependence of quark condensate Σ on an external magnetic field. For weak fields, it rises linearly with the field. Pion mass and residue are also shifted so that the Gell-Mann - Oakes - Renner relation is satisfied. In the strong field region, Σ(H) (eH)3/2.
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