2 research outputs found
Remarks on the Coulomb and Covariant Gauges in Finite Temperature QED
We compare the use of the Coulomb gauge in finite temperature QED with a
recently proposed prescription for covariant gauges, in which only the
transverse photon degrees of freedom are thermalized. Using the Landau rule as
a guide, we clarify the relation between the retarded electron self-energy and
the elements of the self-energy matrix in the real-time formulation of . The
general results are illustrated by means of the one-loop expressions for the
electron self-energy in a QED plasma.Comment: LaTeX, 10 pages, no figures; to be published in Phys. Lett.
Cherenkov radiation by massless neutrinos
Due to their weak interactions, neutrinos can polarize a medium and acquire
an induced charge. We consider the Cherenkov radiation emitted by neutrinos due
to their effective electromagnetic interactions as they pass through a
polarizable medium. The effect exists even for massless, chiral neutrinos,
where no physics beyond the standard model needs to be assumed.Comment: 11 pages Latex file; to appear in Phys. Lett.