Minimal four-family supergravity model
نویسندگان
چکیده
منابع مشابه
A Minimal Four - Family Supergravity Model
In this work, we investigate the phenomenology of minimal four-family MSSM supergravity theories containing an additional generation (t; b; ; ) of heavy fermions along with their superpartners. We constrain the models by demanding: gauge coupling constant uni cation at high energy scales; perturbative values for all Yukawa couplings for energy scales up to the grand-uni cation scale; radiative ...
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Recently, refinements have been made on both the theoretical and experimental determinations of i.) the mass of the lightest Higgs scalar, ii.) the relic density of cold dark matter in the universe, iii.) the branching fraction for the radiative b → sγ decay, iv.) the muon anomalous magnetic moment, and v.) the flavor violating decay Bs → μ+μ−. In this work, we present constraints from each of ...
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We investigate the effect of SUSY phases ( θA and θμ ) on the B 0 d−B 0 d mixing in the minimal supergravity model. It is known that the complex phase θA = arg(A) ( A is the universal coefficient of the trilinear scalar couplings ) is essentially unconstrained by the electric dipole moment experiment, while the phase θμ = arg(μ) ( μ is the supersymmetric Higgsino mass ) is strongly constrained ...
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Pseudo-supersymmetric solutions of minimal N = 2, D = 4 de Sitter supergravity are classified using spinorial geometry techniques. We find two classes of solutions, the first is the cosmological Majumdar-Papapetrou solution of Kastor and Traschen, and the second corresponds to gravitational waves propagating in the Nariai cosmology.
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B–B 0 mixing and a CP violation parameter in K–K 0 mixing ǫK are studied in the minimal supergravity model. We solve the one-loop renormalization group equations for the minimal supersymmetric standard model (MSSM) parameters numerically in order to determine the masses and mixings of the supersymmetric particles, while all off-diagonal (generation mixing) elements and phases of Yukawa coupling...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1996
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.53.1616