Very constrained minimal supersymmetric standard models
- TH Division, CERN, Geneva (Switzerland)
- William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
We consider very constrained versions of the minimal supersymmetric extension of the standard model (VCMSSMs) which, in addition to constraining the scalar masses m{sub 0} and gaugino masses m{sub 1/2} to be universal at some input scale, impose relations between the trilinear and bilinear soft supersymmetry-breaking parameters A{sub 0} and B{sub 0}. These relations may be linear, as in simple minimal supergravity models, or nonlinear, as in the Giudice-Masiero mechanism for generating the Higgs-mixing {mu} term. We discuss the application of the electroweak vacuum conditions in VCMSSMs, which may be used to make a prediction for tan{beta} as a function of m{sub 0} and m{sub 1/2} that is usually unique. We baseline the discussion of the parameter spaces allowed in VCMSSMs by updating the parameter space allowed in the CMSSM for fixed values of tan{beta} with no relation between A{sub 0} and B{sub 0} assumed a priori, displaying contours of B{sub 0} for a fixed input value of A{sub 0}, incorporating the latest CDF/D0 measurement of m{sub t} and the latest BNL measurement of g{sub {mu}}-2. We emphasize that phenomenological studies of the CMSSM are frequently not applicable to specific VCMSSMs, notably those based on minimal supergravity, which require m{sub 0}=m{sub 3/2} as well as A{sub 0}=B{sub 0}+m{sub 0}. We then display (m{sub 1/2},m{sub 0}) planes for selected VCMSSMs, treating in a unified way the parameter regions where either a neutralino or the gravitino is the lightest supersymmetric particle. In particular, we examine in detail the allowed parameter space for the Giudice-Masiero model.
- OSTI ID:
- 20705159
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 5; Other Information: DOI: 10.1103/PhysRevD.70.055005; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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