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Title: Triplet leptogenesis in left-right symmetric seesaw models

Abstract

We discuss scalar triplet leptogenesis in a specific left-right symmetric seesaw model. We show that the Majorana phases that are present in the model can be effectively used to saturate the existing upper limit on the CP-asymmetry of the triplets. We solve the relevant Boltzmann equations and analyze the viability of triplet leptogenesis. It is known for this kind of scenario that the efficiency of leptogenesis is maximal if there exists a hierarchy between the branching ratios of the triplet decays into leptons and Higgs particles. We show that triplet leptogenesis typically favors branching ratios with not too strong hierarchies, since maximal efficiency can only be obtained at the expense of suppressed CP-asymmetries.

Authors:
; ;  [1]
  1. Department of Theoretical Physics, Royal Institute of Technology (KTH), AlbaNova University Center, Roslagstullsbacken 21, 106 91, Stockholm (Sweden)
Publication Date:
OSTI Identifier:
22137759
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2008; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BOLTZMANN EQUATION; BRANCHING RATIO; HIGGS BOSONS; LEPTONS; PARTICLE DECAY; PARTICLE PRODUCTION; SCALARS

Citation Formats

Haellgren, Tomas, Konstandin, Thomas, and Ohlsson, Tommy. Triplet leptogenesis in left-right symmetric seesaw models. United States: N. p., 2008. Web. doi:10.1088/1475-7516/2008/01/014.
Haellgren, Tomas, Konstandin, Thomas, & Ohlsson, Tommy. Triplet leptogenesis in left-right symmetric seesaw models. United States. https://doi.org/10.1088/1475-7516/2008/01/014
Haellgren, Tomas, Konstandin, Thomas, and Ohlsson, Tommy. 2008. "Triplet leptogenesis in left-right symmetric seesaw models". United States. https://doi.org/10.1088/1475-7516/2008/01/014.
@article{osti_22137759,
title = {Triplet leptogenesis in left-right symmetric seesaw models},
author = {Haellgren, Tomas and Konstandin, Thomas and Ohlsson, Tommy},
abstractNote = {We discuss scalar triplet leptogenesis in a specific left-right symmetric seesaw model. We show that the Majorana phases that are present in the model can be effectively used to saturate the existing upper limit on the CP-asymmetry of the triplets. We solve the relevant Boltzmann equations and analyze the viability of triplet leptogenesis. It is known for this kind of scenario that the efficiency of leptogenesis is maximal if there exists a hierarchy between the branching ratios of the triplet decays into leptons and Higgs particles. We show that triplet leptogenesis typically favors branching ratios with not too strong hierarchies, since maximal efficiency can only be obtained at the expense of suppressed CP-asymmetries.},
doi = {10.1088/1475-7516/2008/01/014},
url = {https://www.osti.gov/biblio/22137759}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2008,
place = {United States},
year = {Tue Jan 15 00:00:00 EST 2008},
month = {Tue Jan 15 00:00:00 EST 2008}
}