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

Marta Losada

doi:10.1016/S0550-3213(98)00563-X

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

Marta Losada

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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_tR 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_tR. The allowed region requires a value of m_tR, ≲ m_t and m_h ≲ 100 (110) GeV for m_Q = 300 GeV (1 TeV).

Original language	English (US)
Pages (from-to)	3-31
Number of pages	29
Journal	Nuclear Physics B
Volume	537
Issue number	1-3
DOIs	https://doi.org/10.1016/S0550-3213(98)00563-X
State	Published - Jan 4 1999

Keywords

Baryogenesis
Electroweak phase transition
MSSM

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0550-3213(98)00563-X

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abstract = "We construct an effective three-dimensional theory for the MSSM at high temperatures in the limit of large-mA. 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 mh-mtR 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 mtR. The allowed region requires a value of mtR, ≲ mt and mh ≲ 100 (110) GeV for mQ = 300 GeV (1 TeV).",

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AB - We construct an effective three-dimensional theory for the MSSM at high temperatures in the limit of large-mA. 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 mh-mtR 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 mtR. The allowed region requires a value of mtR, ≲ mt and mh ≲ 100 (110) GeV for mQ = 300 GeV (1 TeV).

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KW - Electroweak phase transition

KW - MSSM

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

Abstract

Keywords

ASJC Scopus subject areas

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