Altas Energías

Constraining Radiative Seesaw Models at colliders

by Dr. Federico von der Pahlen (Universidad de Antioquia)

Wednesday, 8 March 2017 from to (Mexico/General)
at IF-UNAM ( Sala Sandoval Vallarta )
Description
We analyze the present bounds on a scotogenic model, the Radiatiave Type III Seeesaw, in which an additional scalar doublet and at least two fermion triplets of SU(2)L, odd under a global Z2 symmetry, are added to the standard model.
The discrete symmetry guaranties that the lightest new physics (NP) neutral particle is stable, providing a natural dark matter (DM) candidate, and leads to naturally suppressed neutrino masses generated by a one-loop realization of an effective Weinberg operator.
We focus on the case of scalar DM around the electroweak scale with at least one NP fermion triplet at the sub-TeV scale, which may be accessible in present and future LHC searches.
Recasting searches for supersymmetric particles at the LHC we set limits on the masses of the NP particles and their couplings. 
We further analyze the implication for more general scotogenic models with scalar DM.
Finally we analyze the NP Yukawa structure, which relates neutrino physics and collider phenomenology.
Support Email: epeinado@fisica.unam.mx