Cosmological Baryon Asymmetry in Supersymmetric Standard Models and Heavy Particle Effects

Details Cosmological Baryon Asymmetry in Supersymmetric Standard Models and Heavy Particle Effects Cosmological Baryon Asymmetry in Supersymmetric Standard Models and Heavy Particle Effects

1993-10-12

arxiv.org/abs/hep-ph/9310268v3

Phys.Lett. B325 (1994) 392-400

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages in LaTex, 3 PostScript figures included

Scientific paper

10.1016/0370-2693(94)90031-0

Cosmological baryon asymmetry B is studied in supersymmetric standard models, assuming the electroweak reprocessing of B and L. Only when the soft supersymmetry breaking is taken into account, B is proportional to the primordial B-L in the supersymmetric standard models. The ratio $B/(B-L)$ is found to be about one percent less than the nonsupersymmetric case. Even if the primordial B-L vanishes, scalar-leptons can be more efficient than leptons to generate B provided that mixing angles $\th$ among scalar leptons satisfy $|\th| < 10^{-8} (T/{GeV})^{1/2}$.

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