Lepton number violating phenomenology of d = 7 neutrino mass models

• Published in: The journal of high energy physics Vol. 2018; no. 1; pp. 1 - 24
• Main Authors: Cepedello, R., Hirsch, M., Helo, J. C.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-01-2018; Springer Nature B.V; SpringerOpen
• Subjects: Beyond Standard Model; Bosons; Classical and Quantum Gravitation; Constraint modelling; Elementary Particles; High energy physics; Leptons; Neutrino Physics; Neutrinos; Phenomenology; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Searching; String Theory; Upper bounds; Neutrino Physics; Beyond Standard Model
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP01(2018)009

A
bstract
We study the phenomenology of
d
= 7 1-loop neutrino mass models. All models in this particular class require the existence of several new SU(2)
L
multiplets, both scalar and fermionic, and thus predict a rich phenomenology at the LHC. The observed neutrino masses and mixings can easily be fitted in these models. Interestingly, despite the smallness of the observed neutrino masses, some particular lepton number violating (LNV) final states can arise with observable branching ratios. These LNV final states consists of leptons and gauge bosons with high multiplicities, such as 4
l
+ 4
W
, 6
l
+ 2
W
etc. We study current constraints on these models from upper bounds on charged lepton flavour violating decays, existing lepton number conserving searches at the LHC and discuss possible future LNV searches.