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Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology

Anisha, and Banerjee, Upalaparna and Chakrabortty, Joydeep and Englert, Christoph and Spannowsky, Michael (2021) 'Extended Higgs boson sectors, effective field theory, and Higgs boson phenomenology.', Physical Review D, 103 (9).


We consider the phenomenological implications of charged scalar extensions of the Standard Model (SM) Higgs sector in addition to effective field theory (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 → γγ and H → Zγ 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 → γγ branching ratio. Again H → Zγ measurements provide complementary sensitivity that can be exploited in the future.

Item Type:Article
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Publisher statement:Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Date accepted:25 March 2021
Date deposited:14 September 2021
Date of first online publication:12 May 2021
Date first made open access:14 September 2021

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