The neutrinos have tiny mass which is not predicted in the Standard Model. Therefore the extension of the SM is unavoidable. A plethora of scenarios have been proposed to explain the origin of the tiny neutrino mass which include tree level, quantum level and gauge extensions of the SM. In this talk we will discuss about the simple tree level neutrino mass models. Such models can include SM...
We study search for Right Handed Neutrino at ILC. The process we focus on is the Z′ boson mediated Right Handed neutrino (RHN) pair production process. The advantage of RHN pair production process is back ground free process. In final state, RHN pair production shows the same sign leptons.
We generated this process, investigate event properties, develop reconstruction and selection strategies...
The origin of tiny neutrino masses, dark matter, and baryon asymmetry of the universe is still a mystery, and there is no doubt that there is new physics beyond the Standard Model. In a previous work, a new physics model at TeV-scale where all of them can be explained has been proposed, however the authors neglected CPV phases, and on the baryon asymmetry, they only showed the possibility of...
In this talk, I discuss the phenomenology of a minimal model for GeV-scale Majorana dark matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. The theoretical framework extends the Standard Model by two $SU(2)_L$ singlets: one charged Higgs boson and a singlet right-handed fermion. The latter plays the role of the DM candidate. We show that there is an...
We consider the renormalizable leptophilic WIMP models with the scalar mediators which have lepton numbers. We perform a comprehensive analysis for such a WIMP scenario for two distinct cases with SU(2) doublet or singlet mediators considering all the relevant theoretical, cosmological and experimental constraints at present. We show that mono-photon search at ILC experiment can play a...
We study the phenomenology of Standard Model Gauge singlet spin - 3/2 Majorana fermion at the future electron - positron collider. The exotic spin - 3/2 fermion interacts with the Standard Model particles via effective operators with mass dimension 7 or higher. After writing down the complete set of dimension - 7 operators involving the exotic spin - 3/2 fermion, we studied the production,...
