TY  - JOUR
AU  - Cepedello, R.
AU  - Hirsch, M.
AU  - Helo, J. C.
PY  - 2017
DA  - 2017//
TI  - Loop neutrino masses from d=7 operator
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 079
EP  - 21pp
VL  - 07
IS  - 7
PB  - Springer
KW  - Beyond Standard Model
KW  - Neutrino Physics
AB  - We discuss the generation of small neutrino masses from d = 71 -loop diagrams. We first systematically analyze all possible d = 7 1 -loop topologies. There is a total of 48 topologies, but only 8 of these can lead to "genuine" d = 7 neutrino masses. Here, we define genuine models to be models in which neither d = 5 nor d = 7 tree -level masses nor a d = 5 1 -loop mass appear, such that the d = 7 1 -loop is the leading order contribution to the neutrino masses. All genuine models can then be organized w.r.t. their particle content. We find there is only one diagram with no representation larger than triplet, while there are 22 diagrams with quadruplets. We briefly discuss three minimal example models of this kind.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1705.01489
UR  - https://doi.org/10.1007/JHEP07(2017)079
DO  - 10.1007/JHEP07(2017)079
LA  - English
N1  - WOS:000405916600003
ID  - Cepedello_etal2017
ER  -