scholarly journals Dark matter and lepton flavour violation in a hybrid neutrino mass model

2015 ◽  
Vol 2015 (1) ◽  
Author(s):  
Frank Deppisch ◽  
Wei-Chih Huang
Keyword(s):  
Dark Matter ◽  
Neutrino Mass ◽  
Mass Model ◽  
Lepton Flavour Violation ◽  
Flavour Violation ◽  
Lepton Flavour

scholarly journals Confronting grand unification with lepton flavour violation, dark matter and LHC data

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
J. Ellis ◽  
M. E. Gómez ◽  
S. Lola ◽  
R. Ruiz de Austri ◽  
Q. Shafi
Keyword(s):  
Dark Matter ◽  
Group Symmetry ◽  
Neutrino Masses ◽  
High Input ◽  
Lepton Flavour Violation ◽  
Flavour Violation ◽  
Soft Supersymmetry Breaking ◽  
Good Detection ◽  
Lepton Flavour

Abstract We explore possible signatures for charged lepton flavour violation (LFV), sparticle discovery at the LHC and dark matter (DM) searches in grand unified theories (GUTs) based on SU(5), flipped SU(5) (FSU(5)) and SU(4)c×SU(2)L×SU(2)R (4-2-2). We assume that soft supersymmetry-breaking terms preserve the group symmetry at some high input scale, and focus on the non-universal effects on different matter representations generated by gauge interactions at lower scales, as well as the charged LFV induced in Type-1 see-saw models of neutrino masses. We identify the different mechanisms that control the relic DM density in the various GUT models, and contrast their LFV and LHC signatures. The SU(5) and 4-2-2 models offer good detection prospects both at the LHC and in LFV searches, though with different LSP compositions, and the SU(5) and FSU(5) models offer LFV within the current reach. The 4-2-2 model allows chargino and gluino coannihilations with neutralinos, and the former offer good detection prospects for both the LHC and LFV, while gluino coannihilations lead to lower LFV rates. Our results indicate that LFV is a powerful tool that complements LHC and DM searches, providing significant insights into the sparticle spectra and neutrino mass parameters in different models.

scholarly journals MeV neutrino dark matter: relic density, lepton flavour violation and electron recoil

2019 ◽  
Vol 2019 (11) ◽  
Author(s):  
Juri Fiaschi ◽  
Michael Klasen ◽  
Miguel Vargas ◽  
Christian Weinheimer ◽  
Sybrand Zeinstra
Keyword(s):  
Dark Matter ◽  
Lepton Flavour Violation ◽  
Dark Matter Relic Density ◽  
Electron Recoil ◽  
Relic Density ◽  
Flavour Violation ◽  
Lepton Flavour

scholarly journals Signatures of $$A_4$$ symmetry in the charged lepton flavour violating decays in a neutrino mass model

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Rambabu Korrapati ◽  
Jai More ◽  
Ushak Rahaman ◽  
S. Uma Sankar
Keyword(s):  
Neutrino Mass ◽  
Top Quark ◽  
Charged Lepton ◽  
Discrete Symmetry ◽  
Tree Level ◽  
Mass Model ◽  
Neutral Mesons ◽  
Flavour Violation ◽  
Charged Leptons ◽  
Lepton Flavour

AbstractWe study the charged lepton flavour violation in a popular neutrino mass model with $$A_4$$ A 4 discrete symmetry. This symmetry requires the presence of multiple Higgs doublets in the model and it also dictates the flavour violating Yukawa couplings of the additional neutral scalars of the model. Such couplings lead to the decays of the neutral mesons, the top quark and the $$\tau $$ τ lepton into charged leptons of different flavours at tree level. The $$A_4$$ A 4 symmetry of the model leads to certain characteristic signatures in these decays. We discuss these signatures and predict the rates for the most favourable charged lepton flavour violating modes.

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