Loop corrections to the sphaleron transition rate in the minimal standard model

Abstract

The baryon number dissipation rate due to sphaleron transitions at high temperatures in the minimal standard model is evaluated. We find that this rate can be considerably suppressed by one loop contributions of bosonic and fermionic fluctuations which are particularly important for a small mass of the Higgs boson and a large top quark mass. Fixing the latter to its recently stated value of 174 GeV the complete erasure of the baryon asymmetry is prevented within the framework of the minimal standard model if the Higgs mass is less than about 66 GeV.

11 pages (LaTex) plus 2 figures (uuencoded postscript files); RUB-TPII-05/94

References in corpus (3)

• Evidence for Top Quark Production in $\bar{p}p$ Collisions at $\sqrt{s}=1.8$ TeV
• Quantum Fluctuations around the Electroweak Sphaleron
• Fermion sea along the sphaleron barrier

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• A Top Quark Soliton and its Anomalous Chromomagnetic Moment
• The nucleon in the chiral quark model: an alternative computation scheme
• $Z_2$ as the Topological Origin of B+L Violation in the Hot Electroweak Theory
• Nondegenerate Fermions in the Background of the Sphaleron Barrier
• Top-bottom doublet in the sphaleron background