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arXiv · 1712.00338

Exploring collider aspects of a neutrinophilic Higgs doublet model in multilepton channels

Katri Huitu·Timo J. Kärkkäinen·Subhadeep Mondal·Santosh Kumar Rai
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Abstract

We consider a neutrinophilic Higgs scenario where the Standard Model is extended by one additional Higgs doublet and three generations of singlet right-handed Majorana neutrinos. Light neutrino masses are generated through mixing with the heavy neutrinos via Type-I seesaw mechanism when the neutrinophilic Higgs gets a vacuum expectation value (VEV). The Dirac neutrino Yukawa coupling in this scenario can be sizable compared to those in the canonical Type-I seesaw mechanism owing to the small neutrinophilic Higgs VEV giving rise to interesting phenomenological consequences. We have explored various signal regions likely to provide a hint of such a scenario at the LHC as well as at future $e^+e^-$ colliders. We have also highlighted the consequences of light neutrino mass hierarchies in collider phenomenology that can complement the findings of neutrino oscillation experiments.

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Katri Huitu, Timo J. Kärkkäinen, Subhadeep Mondal, Santosh Kumar Rai. 2017-12-01. Exploring collider aspects of a neutrinophilic Higgs doublet model in multilepton channels. https://doi.org/10.1103/physrevd.97.035026

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