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arXiv · 2103.01810

Extended Higgs sectors, effective field theory and Higgs phenomenology

Anisha·Upalaparna Banerjee·Joydeep Chakrabortty·Christoph Englert·Michael Spannowsky
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Abstract

We consider the phenomenological implications of charged scalar extensions of the SM Higgs sector in addition to EFT couplings of this new state to SM matter. We perform a detailed investigation of modifications of loop-induced decays of the 125 GeV Higgs boson, which receives corrections from the propagating charged scalars alongside one-loop EFT operator insertions and demonstrate that the interplay of $H\to \gamma\gamma$ and $H\to Z\gamma$ decays can be used to clarify the additional states phenomenology in case a discovery is made in the future. In parallel, EFT interactions of the charged Higgs can lead to a decreased sensitivity to the virtual presence of charged Higgs states, which can significantly weaken the constraints that are naively expected from the precisely measured $H\to \gamma\gamma$ branching ratio. Again $H\to Z\gamma$ measurements provide complementary sensitivity that can be exploited in the future.

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Anisha, Upalaparna Banerjee, Joydeep Chakrabortty, Christoph Englert, Michael Spannowsky. 2021-03-02. Extended Higgs sectors, effective field theory and Higgs phenomenology. https://doi.org/10.1103/physrevd.103.096009

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