Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-08-18
Phys.Rev. D48 (1993) 5905-5916
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, latex, 18 figures in 3 seperate uuencoded postscript files THU-93/17
Scientific paper
10.1103/PhysRevD.48.5905
We calculate the minimal energy path over the sphaleron barrier in the pre\-sen\-ce of fermions, assuming that the fermions of a doublet are degenerate in mass. This allows for spherically symmetric ans\"atze for the fields, when the mixing angle dependence is neglected. While light fermions have little influence on the barrier, the presence of heavy fermions ($M_F \sim$ TeV) strongly deforms the barrier, giving rise to additional sphalerons for very heavy fermions ($M_F \sim$ 10 TeV). Heavy fermions form non-topological solitons in the vacuum sector.
Kunz Jutta
Nolte Guido
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