Leptogenesis from supersymmetry breaking.
We show that soft supersymmetry breaking terms involving the heavy sneutrinos can lead to sneutrino-antisneutrino mixing and to new sources of CP violation, which are present even if a single generation is considered. These terms are naturally present in supersymmetric versions of leptogenesis scenarios, and they induce indirect CP violation in the decays of the heavy sneutrinos, eventually generating a baryon asymmetry. This new contribution can be comparable to or even dominate over the asymmetry produced in traditional leptogenesis scenarios.
Grossman
Yuval
Y
Department of Physics, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel.
Kashti
Tamar
T
Nir
Yosef
Y
Roulet
Esteban
E