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Title: Type II Leptogenesis

Abstract

We discuss leptogenesis via the out-of-equilibrium decay of the lightest right-handed neutrino in type II see-saw scenarios, where, in addition to the type I see-saw, an additional direct mass term for the light neutrinos is present. The results for the decay asymmetries are presented in theories where this additional contribution stems from the induced vev of a Higgs triplet, and furthermore in an effective, model independent approach. We emphasize that when the neutrino mass scale increases, type II leptogenesis can be more efficient than for hierarchical light neutrinos, in sharp contrast to the type I see-saw cwhere successful thermal leptogenesis even imposes a bound on the neutrino mass scale of about 0.1 eV.

Authors:
 [1];  [2]
  1. Departamento de Fisica Teorica C-XI, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid (Spain)
  2. (Spain)
Publication Date:
OSTI Identifier:
20900805
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 881; Journal Issue: 1; Conference: CICHEP II: Cairo international conference on high energy physics, Cairo (Egypt), 14-17 Jan 2006; Other Information: DOI: 10.1063/1.2435292; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; HIGGS BOSONS; HIGGS MODEL; MASS; NEUTRINOS; PARTICLE DECAY; TRIPLETS

Citation Formats

Antusch, Stefan, and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid. Type II Leptogenesis. United States: N. p., 2007. Web. doi:10.1063/1.2435292.
Antusch, Stefan, & Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid. Type II Leptogenesis. United States. doi:10.1063/1.2435292.
Antusch, Stefan, and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid. Fri . "Type II Leptogenesis". United States. doi:10.1063/1.2435292.
@article{osti_20900805,
title = {Type II Leptogenesis},
author = {Antusch, Stefan and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid},
abstractNote = {We discuss leptogenesis via the out-of-equilibrium decay of the lightest right-handed neutrino in type II see-saw scenarios, where, in addition to the type I see-saw, an additional direct mass term for the light neutrinos is present. The results for the decay asymmetries are presented in theories where this additional contribution stems from the induced vev of a Higgs triplet, and furthermore in an effective, model independent approach. We emphasize that when the neutrino mass scale increases, type II leptogenesis can be more efficient than for hierarchical light neutrinos, in sharp contrast to the type I see-saw cwhere successful thermal leptogenesis even imposes a bound on the neutrino mass scale of about 0.1 eV.},
doi = {10.1063/1.2435292},
journal = {AIP Conference Proceedings},
number = 1,
volume = 881,
place = {United States},
year = {Fri Jan 12 00:00:00 EST 2007},
month = {Fri Jan 12 00:00:00 EST 2007}
}