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

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.Comment: 11 pages (LaTex) plus 2 figures (uuencoded postscript files); RUB-TPII-05/9

Spontaneous violation of ciral symmetry in instanton vacuum and ciral theory of nucleons

The matching of the model of instanton vacuum with the results of algebra of currents and the nucleon description on the base of the effective ciral Langrangian, derived from the model of instanton vacuum are the aim of the paper. As a result the theory of quarks in instanton vacuum out frameworks of zero modes has been constructed, the Wilson's loop in instanton vacuum has been calculated. The theory of nucleons and pion - nucleon scattering on the base of the effective ciral Lagrangian has been constructed. The paper results may be used for the further theoretical investigation of the instanton vacuum model and ciral theory of nucleons in many institutes of Russian Academy of SciencesAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio