FERMIONIC DISPERSION-RELATIONS IN THE STANDARD MODEL AT FINITE-TEMPERATURE

被引:36
作者
QUIMBAY, C
VARGASCASTRILLON, S
机构
[1] CERN, TH Division
关键词
D O I
10.1016/0550-3213(95)00298-7
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
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 not equal 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.
引用
收藏
页码:265 / 302
页数:38
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