Report/Journal Article

PUBDB-2014-04352

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png CP violation in bilinear R-parity violation and its consequences for the early universe

Chériguène, A. (Corresponding Author) ; Porod, W. ; Liebler, S.Extern*

2014
Soc. [S.l.]

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Please use a persistent id in citations: doi:10.1103/PhysRevD.90.055012  doi:10.3204/PUBDB-2014-04352

Report No.: DESY 14-109; arXiv:1406.7837

Abstract: Supersymmetric models with bilinear $R$-parity violation (BRpV) provide a framework for neutrino masses and mixing angles to explain neutrino oscillation data. We consider $CP$ violation within the new physical phases in BRpV and discuss their effect on the generation of neutrino masses and the decays of the lightest supersymmetric particle (LSP), being a light neutralino with mass $\sim 100\text{}\text{}\mathrm{GeV}$, at next-to-leading order. The decays affect the lepton and via sphaleron transitions the baryon asymmetry in the early universe. For a rather light LSP, asymmetries generated before the electroweak phase transition via e.g. the Affleck-Dine mechanism are reduced up to 2 orders of magnitude, but are still present. On the other hand, the decays of a light LSP themselves can account for the generation of a lepton and baryon asymmetry, the latter in accordance with the observation in our universe, since the smallness of the BRpV parameters allows for an out-of-equilibrium decay and sufficiently large $CP$ violation is possible consistent with experimental bounds from the nonobservation of electric dipole moments.

Keyword(s): CP: violation ; R parity: violation ; neutrino: mass ; baryon: asymmetry ; neutrino: oscillation ; electroweak interaction: critical phenomena ; sphaleron: transition ; higher-order: 1 ; LSP ; lepton ; Affleck-Dine model ; mixing angle ; neutralino ; sparticle

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Contributing Institute(s):

1. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 514 - Theoretical Particle Physics (POF2-514) (POF2-514)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2014

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint/Internal Report Cheriguene, A. (Corresponding Author) ; Liebler, S.Extern* ; Porod, W.
CP violation in bilinear R-parity violation and its consequences for the early universetheorie
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