TY  - JOUR
AU  - Racker, J.
AU  - Pena, M.
AU  - Rius, N.
PY  - 2012
DA  - 2012//
TI  - Leptogenesis with small violation of B – L
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 030
EP  - 18pp
VL  - 07
IS  - 7
PB  - Iop Publishing Ltd
KW  - leptogenesis
KW  - neutrino theory
AB  - We analyze leptogenesis in the context of seesaw models with almost conserved lepton number, focusing on the L-conserving contribution to the flavoured CP asymmetries. We find that, contrary to previous claims, successful leptogenesis is feasible for masses of the lightest heavy neutrino as low as M-1 similar to 10(6) GeV, without resorting to the resonant enhancement of the CP asymmetry for strongly degenerate heavy neutrinos. This lower limit renders thermal leptogenesis compatible with the gravitino bound in supersymmetric scenarios.
SN  - 1475-7516
UR  - http://arxiv.org/abs/arXiv:1205.1948
UR  - https://doi.org/10.1088/1475-7516/2012/07/030
DO  - 10.1088/1475-7516/2012/07/030
LA  - English
N1  - WOS:000307079600025
ID  - Racker_etal2012
ER  -