Fermionic Dispersion Relations in the Standard Model at Finite Temperature

Details Fermionic Dispersion Relations in the Standard Model at Finite Temperature Fermionic Dispersion Relations in the Standard Model at Finite Temperature

1995-04-27

arxiv.org/abs/hep-ph/9504410v1

Nucl.Phys.B451:265-304,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

40 pages, LaTex, 10 compressed, tarred and uuencoded figures in a separate file

Scientific paper

10.1016/0550-3213(95)00298-7

We compute the one-loop dispersion relations at finite temperature for quarks, charged leptons and neutrinos in the Minimal Standard Model. The dispersion relations are calculated in two different plasma situations: for a vacuum expectation value $\upsilon$ of the Higgs field $\upsilon \neq 0$ (broken electroweak symmetry) and for $\upsilon=0$ (unbroken electroweak symmetry). The flavour and chiral non-degeneracy of the quasi-particle spectrum is studied. Numerical results show that the thermal effective masses for fermions in the broken phase have a smaller value than those in the unbroken phase. The temperature dependence of the top quark and electron neutrino thermal effective masses is also presented. Gauge invariance of one-loop dispersion relations is studied.

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