TY  - JOUR
AU  - Arbelaez, C.
AU  - Dib, C.
AU  - Monsalvez-Pozo, K.
AU  - Schmidt, I.
PY  - 2021
DA  - 2021//
TI  - Quasi-Dirac neutrinos in the linear seesaw model
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 154
EP  - 22pp
VL  - 07
IS  - 7
PB  - Springer
KW  - Beyond Standard Model
KW  - Neutrino Physics
AB  - 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2104.08023
UR  - https://doi.org/10.1007/JHEP07(2021)154
DO  - 10.1007/JHEP07(2021)154
LA  - English
N1  - WOS:000677622200005
ID  - Arbelaez_etal2021
ER  -