The two-loop finite-temperature effective potential of the MSSM and baryogenesis

We construct an effective three-dimensional theory for the MSSM at high temperatures in the limit of large- m A . We analyse the two-loop effective potential of the 3D theory for the case of a light right-handed stop to determine the precise region in the m h−m t R plane for which the sphaleron cons...

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Bibliographic Details
Published in:Nuclear physics. B 1999-01, Vol.537 (1), p.3-31
Main Author: Losada, Marta
Format: Article
Language:English
Subjects:
Baryogenesis
Electroweak phase transition
MSSM
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Summary:We construct an effective three-dimensional theory for the MSSM at high temperatures in the limit of large- m A . We analyse the two-loop effective potential of the 3D theory for the case of a light right-handed stop to determine the precise region in the m h−m t R plane for which the sphaleron constraint for preservation of the baryon asymmetry is satisfied. We also compare with results previously obtained using 3D and 4D calculations of the effective potential. A two-stage phase transition still persists for a small range of values of m t R . The allowed region requires a value of m t r ⪅ m t and m h ⪅ 100 (100) GeV for m Q = 300 GeV (1 TeV).
ISSN:0550-3213
1873-1562
DOI:10.1016/S0550-3213(98)00563-X