CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy

Details CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy

2008-06-17

arxiv.org/abs/0806.2832v3

JHEP 0809:053,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 7 figures

Scientific paper

10.1088/1126-6708/2008/09/053

We suppose that the baryon asymmetry is produced by thermal leptogenesis (with flavour effects), at temperatures $\sim 10^{9} - 10^{10}$ GeV, in the supersymmetric seesaw with universal and real soft terms. The parameter space is restricted by assuming that $l_\alpha \to l_\beta \gamma$ processes will be seen in upcoming experiments. We study the sensitivity of the baryon asymmetry to the phases of the lepton mixing matrix, and find that leptogenesis can work for any value of the phases. We also estimate the contribution to the electric dipole moment of the electron, arising from the seesaw, and find that it is (just) beyond the sensitivity of next generation experiments ($\lsim 10^{-29} e$ cm). The fourteen dimensional parameter space is efficiently explored with a Monte Carlo Markov Chain, which concentrates on the regions of interest.

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