Affleck-Dine (Pseudo)-Dirac Neutrinogenesis

Details Affleck-Dine (Pseudo)-Dirac Neutrinogenesis Affleck-Dine (Pseudo)-Dirac Neutrinogenesis

2006-01-18

arxiv.org/abs/hep-ph/0601149v3

JHEP 0605 (2006) 024

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 3 figures, 1 bib file, 2 added reference, 1 minor correction, 1 added comment

Scientific paper

10.1088/1126-6708/2006/05/024

We consider the Affleck-Dine mechanism for leptogenesis in the minimal MSSM with Dirac or Pseudo-Dirac neutrinos. The rolling of scalars along D-flat directions generates a left-right asymmetry in the sneutrino sector, only the left part of which is transferred to a baryon asymmetry via sphaleron transitions. In the pure Dirac case the baryon asymmetry of the Universe is thus mirrored by an equal and opposite asymmetry in the leptons. The mechanism is also found to work when the neutrinos are pseudo-Dirac. No additional field needs to be added to the MSSM other than the right-handed neutrino.

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