Gell-Mann - Oakes - Renner relation in a magnetic field at finite temperature
N. O. Agasian, I. A. Shushpanov
Abstract
In the first order of chiral perturbation theory the corrections to Fπ0 and Mπ0 in a magnetic field at finite temperature have been found. It was shown that they are shifted in such a manner that Gell-Mann - Oakes - Renner relation remains valid under these conditions.
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