TY  - JOUR
AU  - Helo, J. C.
AU  - Hirsch, M.
AU  - Ota, T.
AU  - Pereira dos Santos, F. A.
PY  - 2015
DA  - 2015//
TI  - Double beta decay and neutrino mass models
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 092
EP  - 40pp
VL  - 05
IS  - 5
PB  - Springer
KW  - Beyond Standard Model
KW  - Neutrino Physics
AB  - Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always contribute to the decay rate, however, it is not a priori guaranteed to be the dominant contribution in all models. Here, we discuss whether the mass mechanism dominates or not from the theory point of view. We classify all possible (scalar-mediated) short-range contributions to the decay rate according to the loop level, at which the corresponding models will generate Majorana neutrino masses, and discuss the expected relative size of the different contributions to the decay rate in each class. Our discussion is general for models based on the SM group but does not cover models with an extended gauge. We also work out the phenomenology of one concrete 2-loop model in which both, mass mechanism and short-range diagram, might lead to competitive contributions, in some detail.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1502.05188
UR  - https://doi.org/10.1007/JHEP05(2015)092
DO  - 10.1007/JHEP05(2015)092
LA  - English
N1  - WOS:000363471700001
ID  - Helo_etal2015
ER  -