%0 Journal Article
%T Quasi-Dirac neutrinos in the linear seesaw model
%A Arbelaez, C.
%A Dib, C.
%A Monsalvez-Pozo, K.
%A Schmidt, I.
%J Journal of High Energy Physics
%D 2021
%V 07
%N 7
%I Springer
%@ 1029-8479
%G English
%F Arbelaez_etal2021
%O WOS:000677622200005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4930), last updated on Fri, 13 Aug 2021 09:54:26 +0000
%X We implement a minimal linear seesaw model (LSM) for addressing the Quasi-Dirac (QD) behaviour of heavy neutrinos, focusing on the mass regime of M-N less than or similar to M-W. Here we show that for relatively low neutrino masses, covering the few GeV range, the same-sign to opposite-sign dilepton ratio, R-ll, can be anywhere between 0 and 1, thus signaling a Quasi-Dirac regime. Particular values of R-ll are controlled by the width of the QD neutrino and its mass splitting, the latter being equal to the light-neutrino mass m(nu) in the LSM scenario. The current upper bound on m(nu 1) together with the projected sensitivities of current and future |U-N l|(2) experimental measurements, set stringent constraints on our low-scale QD mass regime. Some experimental prospects of testing the model by LHC displaced vertex searches are also discussed.
%K Beyond Standard Model
%K Neutrino Physics
%R 10.1007/JHEP07(2021)154
%U https://arxiv.org/abs/2104.08023
%U https://doi.org/10.1007/JHEP07(2021)154
%P 154-22pp