New ways to leptogenesis with gauged B-L symmetry

Babu, K.S.; Meng, Yanzhi; Tavartkiladze, Zurab

doi:10.1016/j.physletb.2009.09.036

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

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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:: Babu, K.S.; Meng, Yanzhi; Tavartkiladze, Zurab

Publication Date:: Thu Oct 01 00:00:00 EDT 2009

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.

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                    Babu, K.S., Meng, Yanzhi, & Tavartkiladze, Zurab. New ways to leptogenesis with gauged B-L symmetry.  Netherlands.  https://doi.org/10.1016/j.physletb.2009.09.036

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                    Babu, K.S., Meng, Yanzhi, and Tavartkiladze, Zurab. Thu .  
"New ways to leptogenesis with gauged B-L symmetry".  Netherlands.  https://doi.org/10.1016/j.physletb.2009.09.036.

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@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         = {Thu Oct 01 00:00:00 EDT 2009},

  month        = {Thu Oct 01 00:00:00 EDT 2009}

}

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