Quark condensate in a weak magnetic field
Quark condensate in a weak magnetic field
The low-temperature representation for the quark condensate in a weak magnetic field $H$ is known up to two-loop order. Remarkably, at one-loop order, the published series for the quark condensate in the chiral limit and $H\ensuremath{\ll}{T}^{2}$ are inconsistent. Using an alternative representation for the kinematical Bose functions, we derive the …