标题： 电弱标准模型中对撞子跃迁率的环修正 显示英文标题

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

摘要： 重子数在最小标准模型中由于瞬子转变在高温下的耗散率被评估。 我们发现，这种耗散率可以通过玻色子和费米子涨落的一环贡献显著抑制，这对于希格斯玻色子质量较小和顶夸克质量较大特别重要。 将后者固定为最近给出的174 GeV值，在最小标准模型框架内，如果希格斯质量小于约66 GeV，则重子不对称性完全消失的情况可以被阻止。 显示英文摘要

摘要： 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.