Speaker
Chandan Hati
(PRL, Ahmedabad)
Description
The discovery of a right-handed charged gauge boson $W_R^\pm$ with mass of around a few TeV, for example through a signal of two leptons and two jets that has been reported by CMS to have a 2.8$\sigma$ local excess or through a signal of a resonance decaying into a pair of Standard Model gauge bosons showing a local excess of 3.4$\sigma$ (2.5$\sigma$ global) reported by ATLAS search, can have severe implications for the leptogenesis mechanism, which offers a very attractive possibility to explain the baryon asymmetry of the universe. In this talk I shall discuss the constraints on the high scale as well as the TeV scale leptogenesis from lepton number violating scattering processes mediated via right-handed heavy neutrinos ($N_{R}$) and the right-handed doubly charged Higgs $\Delta^{++}_{R}$ which can rule out the possibility of successful leptogenesis for $W_{R}^{\pm}$ with mass in the TeV range. Complementing the above results, we shall also discuss the low-energy subgroups of superstring motivated $E_{6}$ model which can allow for high-scale leptogenesis, and explain the excess signal at the LHC reported by the CMS experiment from resonant slepton decay.
