Constraining Neutrino Mass from Neutrinoless Double Beta Decay in TeV Scale Left-Right Model

por Manimala Mitra (University of Durham)

jueves 14 nov. 2013 15:00 → 16:00 Europe/Madrid

Planta baja. Sala de Juntas (IFIC)

We discuss neutrinoless double beta decay in a TeV scale Left-Right model. We study the implications of the recent results on neutrinoless double beta decay from GERDA-I and KamLAND-Zen+ EXO-200 and the upper limit on the sum of light neutrino masses from Planck. We show that the upper limits on the effective neutrino mass from 136-Xe are stronger than those from 76-Ge for most of the recent calculations of the nuclear matrix elements (NMEs). Imposing the most stringent limit from Planck, we find that the canonical light neutrino contribution cannot saturate the current limit, irrespective of the NME uncertainties. Saturation can be reached by inclusion of the right-handed (RH) neutrino contributions in TeV-scale Left-Right symmetric models with Type-II seesaw. This imposes a lower limit on the lightest neutrino mass. Using the recent bounds from neutrinoless double beta decay, we also derive correlated constraints in the RH sector, complimentary to those from direct searches at the LHC.