%0 Journal Article
%T Quasi-Dirac neutrinos at the LHC
%A Anamiati, G.
%A Hirsch, M.
%A Nardi, E.
%J Journal of High Energy Physics
%D 2016
%V 10
%N 10
%I Springer
%@ 1029-8479
%G English
%F Anamiati_etal2016
%O WOS:000385397800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2834), last updated on Fri, 11 Nov 2016 14:43:52 +0000
%X Lepton number violation is searched for at the LHC using same-sign leptons plus jets. The standard lore is that the ratio of same-sign lepton to opposite-sign lepton events, R-ll, is equal to R-ll = 1 (R-ll = 0) for Majorana (Dirac) neutrinos. We clarify under which conditions the ratio Rll can assume values different from 0 and 1, and we argue that the precise value 0 < R-ll < 1 is controlled by the mass splitting versus the width of the quasi-Dirac resonances. A measurement of R-ll not equal 0, 1 would then contain valuable information about the origin of neutrino masses. We consider as an example the inverse seesaw mechanism in a left-right symmetric scenario, which is phenomenologically particularly interesting since all the heavy states in the high energy completion of the model could be within experimental reach. A prediction of this scenario is a correlation between the values of R-ll and the ratio between the rates for heavy neutrino decays into standard model gauge bosons, and into three body final states ljj mediated by off-shell W-R exchange.
%K Beyond Standard Model
%K Neutrino Physics
%R 10.1007/JHEP10(2016)010
%U http://arxiv.org/abs/1607.05641
%U https://doi.org/10.1007/JHEP10(2016)010
%P 010-19pp