Phenomenological Consequences of Soft Leptogenesis

Details Phenomenological Consequences of Soft Leptogenesis Phenomenological Consequences of Soft Leptogenesis

2004-10-24

arxiv.org/abs/hep-ph/0410319v2

Phys.Rev. D71 (2005) 013008

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 figure; v2: an additional contribution is considered (modifying: fig. 1, eq. 10-13, 22) and a reference added. Con

Scientific paper

10.1103/PhysRevD.71.013008

Soft supersymmetry breaking terms involving heavy singlet sneutrinos can be the dominant source of leptogenesis. The relevant range of parameters is different from standard leptogenesis: a lighter Majorana mass, M < 10^9 GeV (allowing a solution of the gravitino problem), and smaller Yukawa couplings, Y_N < 10^{-4}. We investigate whether the various couplings of the singlet sneutrinos, which are constrained by the requirement of successful `soft leptogenesis', can have observable phenomenological consequences. Specifically, we calculate the contributions of the relevant soft supersymmetric breaking terms to the electric dipole moments of the charged leptons and to lepton flavor violating decays. Our result is that these contributions are small.

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