On the electroweak phase transition in the minimal supersymmetric Standard Model
Mar, 1993
17 pages
Published in:
- Phys.Lett.B 307 (1993) 106-115
e-Print:
- hep-ph/9303317 [hep-ph]
Report number:
- CERN-TH-6833-93,
- IEM-FT-69-93
View in:
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Abstract:
We study the finite-temperature effective potential of the Minimal Supersymmetric Standard Model, in the limit of only one light Higgs boson. Because of the large top Yukawa coupling, there can be significant differences with respect to the Standard Model case: for given values of the Higgs and top masses, little supersymmetry breaking in the stop sector can make the phase transition more strongly first-order. After including the full structure of the stop mass matrix, the most important experimental constraints and the leading plasma effects, we find that the present limits on Higgs and squark masses are still compatible with the scenario of electroweak baryogenesis, in a small region of parameter space corresponding to m_h \simlt 70 \gev and \msba \simlt 105 \gev.- electroweak interaction: critical phenomena
- critical phenomena: electroweak interaction
- supersymmetry
- effective potential: finite temperature
- Higgs particle: mass
- mass: Higgs particle
- coupling: Yukawa
- Yukawa: coupling
- postulated particle: squark
- mass: squark
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