Pion decay constants in a strong magnetic field
Abstract
Decay constants of the charged and neutral pions in magnetic field are considered in the framework of the effective quark-antiquark lagrangian respecting Gell-Mann--Oakes--Renner (GOR) relations at zero field. The eqBσ dependence is found in strong fields eqB σ for the neutral pion, while the charged pion constant decreases as σeqB.
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