Threshold corrections to the MSSM finite-temperature Higgs potentialстатья

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[1] Dolgopolov M. V., Dubinin M. N., Rykova E. N. Threshold corrections to the mssm finite-temperature higgs potential // Journal of Modern Physics. — 2011. — Vol. 2, no. 5. — P. 301–322. In the minimal supersymmetric standard model (MSSM) the one-loop finite-temperature corrections from the squark-Higgs bosons sector are calculated, the effective two-Higgs-doublet potential is reconstructed and possibilities of the electroweak phase transition in full MSSM (mH±, tgβ, At,b, μ, mQ, mU, mD) parameter space are studied. At large values of At,b and μ of around 1 TeV, favored indirectly by LEP2 and Tevatron data, the threshold finite-temperature corrections from triangle and box diagrams with intermediate third generation squarks are very substantial. The four types of bifurcation sets are defined for the two-Higgs-doublet potential. High sensitivity of the low-temperature evolution to the effective two-doublet and the MSSM squark sector parameters is observed, but rather extensive regions of the full MSSM parameter space allow the first-order electroweak phase transition respecting the phenomenological constraints at zero temperature. As a rule, these regions of the MSSM parameter space are in line with the case of a light stop quark. [ DOI ]

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