Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-02-07
Phys.Rev. D53 (1996) 3366-3391
Physics
High Energy Physics
High Energy Physics - Phenomenology
49 pages, 5 figures (uuencoded PostScript); fixing of the renormalization scale has been improved, numerics has been extended
Scientific paper
10.1103/PhysRevD.53.3366
We calculate the dissipation of the baryon number after the electroweak phase transition due to thermal fluctuations above the sphaleron barrier. We consider not only the classical Boltzmann factor but also fermionic and bosonic one-loop contributions. We find that both bosonic and especially fermionic fluctuations can considerably suppress the transition rate. Assuming the Langer--Affleck formalism for this rate, the condition that an initial baryon asymmetry must not be washed out by sphaleron transitions leads, in the Minimal Standard Model ($\sin\theta_W=0$), to an upper bound for the Higgs mass in the range 60 to 75 GeV.
Diakonov Dmitri
Goeke Klaus
Polyakov Maxim
Schaldach Joerg
Sieber Peter
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