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Title: New ways to leptogenesis with gauged B - L symmetry

Abstract

We show that in supersymmetric models with gauged B-L symmetry, there is a new source for cosmological lepton asymmetry. The Higgs bosons responsible for B-L gauge symmetry breaking decay dominantly into right-handed sneutrinos N ~ and N ~* producing an asymmetry in N ~ over N ~*. This can be fully converted into ordinary lepton asymmetry in the decays of N ~. In simple models with gauged B-L symmetry we show that resonant/soft leptogenesis is naturally realized. Supersymmetry guarantees quasi-degenerate scalar states, while soft breaking of SUSY provides the needed CP violation. Acceptable values of baryon asymmetry are obtained without causing serious problems with gravitino abundance.

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE; Georgia National Science Foundation (GNSF), Atlanta, GA (United States)
OSTI Identifier:
1209393
Grant/Contract Number:  
FG02-ER46140; FG02-04ER41306
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 681; Journal Issue: 1; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Babu, K.S., Meng, Yanzhi, and Tavartkiladze, Zurab. New ways to leptogenesis with gauged B-L symmetry. Netherlands: N. p., 2009. Web. doi:10.1016/j.physletb.2009.09.036.
Babu, K.S., Meng, Yanzhi, & Tavartkiladze, Zurab. New ways to leptogenesis with gauged B-L symmetry. Netherlands. doi:10.1016/j.physletb.2009.09.036.
Babu, K.S., Meng, Yanzhi, and Tavartkiladze, Zurab. Thu . "New ways to leptogenesis with gauged B-L symmetry". Netherlands. doi:10.1016/j.physletb.2009.09.036.
@article{osti_1209393,
title = {New ways to leptogenesis with gauged B-L symmetry},
author = {Babu, K.S. and Meng, Yanzhi and Tavartkiladze, Zurab},
abstractNote = {We show that in supersymmetric models with gauged B-L symmetry, there is a new source for cosmological lepton asymmetry. The Higgs bosons responsible for B-L gauge symmetry breaking decay dominantly into right-handed sneutrinos N~ and N~* producing an asymmetry in N~ over N~*. This can be fully converted into ordinary lepton asymmetry in the decays of N~. In simple models with gauged B-L symmetry we show that resonant/soft leptogenesis is naturally realized. Supersymmetry guarantees quasi-degenerate scalar states, while soft breaking of SUSY provides the needed CP violation. Acceptable values of baryon asymmetry are obtained without causing serious problems with gravitino abundance.},
doi = {10.1016/j.physletb.2009.09.036},
journal = {Physics Letters. Section B},
number = 1,
volume = 681,
place = {Netherlands},
year = {2009},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2009.09.036

Citation Metrics:
Cited by: 6 works
Citation information provided by
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