Leptogenesis without violation of B-L

M. C. GONZALEZ-GARCIA; J. RACKER; N. RIUS

JOURNAL OF HIGH ENERGY PHYSICS - (Online)

IOP PUBLISHING LTD

Año: 2009 vol. 2009 p. 1 - 20

1029-8479

We study the possibility of generating the observed baryon asymmetry via leptogenesis in the decay of heavy Standard Model singlet fermions which carry lepton number, in a framework without Majorana masses above the electroweak scale. Such scenario does not contain any source of total lepton number violation besides the Standard Model sphalerons, and the baryon asymmetry is generated by the interplay of lepton flavour effects and the sphaleron decoupling in the decay epoch.