Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 58: Jenseits des Standardmodells 2 (Theorie)

T 58.9: Talk

Tuesday, March 10, 2015, 18:45–19:00, K.11.20 (K5)

On the Stability of the Parity Symmetry of the Scotogenic Model — Alexander Merle and •Moritz Platscher — Max-Planck-Institut fuer Physik, Foehringer Ring 6, 80805 Muenchen

We study the 1-loop structure of the scotogenic model - a simple extension of the SM by an inert scalar doublet and heavy singlet Majorana neutrino fields, all having odd charge under a Z_2 symmetry. This model can account for a variety of phenomena, such as small neutrino masses, lepton flavour violation and Dark Matter. In addition to the well-known theoretical and experimental bounds on the model's scalar sector, we consider the issue of naturalness which arises as the heavy Majorana fermions are coupled to the inert doublet and give rise to potentially large negative corrections to the corresponding scalar mass parameter. Thus, the right choice of model parameters is indespensible to keep the central parity symmetry intact.