Probing Doubly Charged Higgs Bosons at the LHC through Photon Initiated Processes

Abstract

We show that the photon-photon fusion process contributes significantly to the pair production of doubly charged Higgs bosons at the LHC at a level comparable to the Drell-Yan production. We reinterpret the ATLAS lower limit of 570 GeV (420 GeV) on the mass of ${\Delta }_L^{\pm \pm }$ (${\Delta }_R^{\pm \pm }$) arising from $SU(2{)}_L$ triplet (singlet) scalar by including the photon initiated process and derive a new lower limit of 748 GeV (570 GeV), assuming that ${\Delta }^{\pm \pm }$ decays into $e^{\pm }{e}^{\pm }$ 100% of the time. We have also shown that the 5$\sigma$ discovery reach for ${\Delta }_L^{\pm \pm }$ (${\Delta }_R^{\pm \pm }$) is 846 GeV (783 GeV) with 100 fb${}^{-1}$ luminosity at 13 TeV LHC. We derive a somewhat more stringent limit on the mass when the doubly charged scalar arises from higher dimensional representations of $SU(2{)}_L$.

arXiv comment20 Pages, 11 Figures

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