6533b7d6fe1ef96bd1265c8f
RESEARCH PRODUCT
CP Violation in the SUSY Seesaw: Leptogenesis and Low Energy
Nuria RiusSacha DavidsonFederica PaloriniJulia Garayoasubject
PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyPontecorvo–Maki–Nakagawa–Sakata matrixFísicaFOS: Physical sciencesSupersymmetryParameter space01 natural sciencesHigh Energy Physics - PhenomenologyElectric dipole momentBaryon asymmetryHigh Energy Physics - Phenomenology (hep-ph)Seesaw molecular geometryLeptogenesis[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]0103 physical sciencesCP violation010306 general physicsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-06-17 |