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We consider the collider phenomenology of a simple extension of the StandardModel (SM), which consists of an EW isospin $3/2$ scalar, $\Delta$ and a pairof EW isospin $1$ vector like fermions, $\Sigma$ and $\bar{\Sigma}$,responsible for generating tiny neutrino mass via the effective dimension sevenoperator. This scalar quadruplet with hypercharge Y = 3 has a plethora ofimplications at the collider experiments. Its signatures at TeV scale collidersare expected to be seen, if the quadruplet masses are not too far above theelectroweak symmetry breaking scale. In this article, we study thephenomenology of multi-charged quadruplet scalars. In particular, we study themulti-lepton signatures at the Large Hadron Collider (LHC) experiment, arisingfrom the production and decays of triply and doubly charged scalars. We studiedDrell-Yan (DY) pair production as well as pair production of the chargedscalars via photon-photon fusion. For doubly and triply charged scalars, photonfusion contributes significantly for large scalar masses. We also studied LHCconstraints on the masses of doubly charged scalars in this model. We derive alower mass limit of 725 GeV on doubly charged quadruplet scalar.

Neutrino Mass Generation at TeV Scale and New Physics Signatures from Charged Higgs at the LHC for Photon Initiated Processes