Some implications of charge and color breaking in the MSSM
نویسندگان
چکیده
منابع مشابه
Color and charge breaking minima in the MSSM
A generic feature of theories with (softly broken) supersymmetry is a scalar potential, V (φ), that depends on a large number of scalar fields φ = (φ1, ..., φn). For this reason, the scalar potential of the MSSM, unlike that of the Standard Model, may have a number of local minima characterized by different gauge symmetries. In particular, the supersymmetric partners of quarks, Q̃ L and q̃ R , ma...
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The presence of scalar fields with color and electric charge in supersymmetric theories makes feasible the existence of dangerous charge and color breaking (CCB) minima and unbounded from below directions (UFB) in the effective potential, which would make the standard vacuum unstable. The avoidance of these occurrences imposes severe constraints on the supersymmetric parameter space. We give he...
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The scalar potential of the MSSM may have local and global minima characterized by non-zero expectation values of charged and colored bosons. Even if the true vacuum is not color and charge conserving, the early Universe is likely to occupy the minimum of the potential in which only the neutral Higgs fields have non-zero vev’s. The stability of this false vacuum with respect to quantum tunnelin...
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The MSSM potential can have unphysical minima deeper than the physically acceptable one. We point out that their presence is quite generic in SO(10) unification with supergravity mediated soft terms. However, at least for moderate values of tanβ, the physically acceptable vacuum has a life-time longer than the universe age. Furthermore, by discussing the evolution of the universe in an inflatio...
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We examine charge/colour breaking along directions in supersymmetric field space which are F andD-flat. We catalogue the dangerous directions and include some new ones which have not previously been considered. Analytic expressions for the resulting constraints are provided which are valid for all patterns of supersymmetry breaking. As an example we consider a recently proposed pattern of super...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(96)01281-6