J. Morales et al., Fermionic dispersion relations at finite temperature and non-vanishing chemical potentials in the minimal standard model, NUCL PHYS B, 560(1-3), 1999, pp. 601-616
We calculate the fermionic dispersion relations in the minimal standard mod
el at finite temperature in presence of non-vanishing chemical potentials d
ue to the CP-asymmetric fermionic background. The dispersion relations are
calculated for a vacuum expectation value of the Higgs field equal to zero
(unbroken electroweak symmetry). The calculation: is performed in the real
time formalism of the thermal field theory at one-loop order in a general x
i gauge. The fermionic self-energy is calculated at leading order in temper
ature and chemical potential and this fact permits us to obtain gauge-invar
iant analytical expressions for the dispersion: relations. (C) 1999 Elsevie
r Science B.V. All rights reserved.