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arXiv · hep-ph/9909448

Quasi-Fixed Points and Charge and Colour Breaking in Low Scale Models

S. A. Abel·B. C. Allanach
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Abstract

We show that the current LEP2 lower bound upon the minimal supersymmetric standard model (MSSM) lightest Higgs mass rules out quasi-fixed scenarios for string scales between 10^6 and 10^{11} GeV unless the heaviest stop mass is more than 2 TeV. We consider the implications of the low string scale for charge and colour breaking (CCB) bounds in the MSSM, and demonstrate that CCB bounds from F and D-flat directions are significantly weakened. For scales less than 10^{10} GeV these bounds become merely that degenerate scalar mass squared values are positive at the string scale.

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S. A. Abel, B. C. Allanach. 2000-06-08. Quasi-Fixed Points and Charge and Colour Breaking in Low Scale Models. https://doi.org/10.1088/1126-6708%2F2000%2F07%2F037

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