One Loop Neutrino Masses within Minimal Dark Matter and Accidental Matter Scenarios

by Daniel Wegman (Univertité Liege)

Wednesday 14 Sept 2016, 13:00 → 14:00 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

High order multiplets of SU(2) can’t couple to the Standard Model particles with renormalisable interactions, allowing for the correction of two interesting models: Minimal Dark Matter (MDM), and Accidental Matter (AM). The first models achieve the stability of a dark matter candidates without the need for extra gauge symmetries. The second models explain the lack of new physics at colliders while showing the possibility of finding these particles at higher scales. These high order multiplets have another interesting application, they can’t be used to produce neutrino masses at tree level, giving a natural explanation to radiative masses without the need of extra symmetries. In this work we tried to combine the ideas of radiative neutrino masses and high SU(2) multiplets within MDM or AM scenarios, showing in the first case the dark matter becomes unstable for all possible models. While for AM models, we show that under fairly-reasonable assumptions there are scenarios where the new physics scale is as low as 10^6 GeV giving observables that are potentially accessible in indirect searches, thus increasing their experimental testability. Of particular relevance are processes involving rare charged lepton-flavor-violating decays.