https://doi.org/10.1140/epjc/s2004-02022-1
theoretical physics
Dirac leptogenesis and anomalous U(1)
1
Physics Department, Hacettepe University, 06532, Beytepe, Ankara, Turkey
2
Physics Department, Middle East Technical University, 06530, Ankara, Turkey
* e-mail: mugeboz@phys.hacettepe.edu.tr
We consider Dirac leptogenesis in supersymmetric theories where the supersymmetry breaking is transmitted to the observable sector by an anomalous U(1) symmetry. This kind of supersymmetry breaking is known to provide a solution to the μ problem and avoid large CP-violation effects. The asymmetries generated by the decays of heavy leptons do not suffer from wash-out due to the equilibration of left- and right-handed neutrinos thanks to the extreme smallness of the neutrino masses. The model ties up the smallness of the neutrino masses and the out-of-equilibrium nature of the heavy lepton decays with no tension with the overproduction of gravitinos.
© Springer-Verlag, 2004
