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SU(2)L triplet scalar as the origin of the 95 GeV excess?


Ashanujjaman, Saiyad; Banik, Sumit; Coloretti, Guglielmo; Crivellin, Andreas; Mellado, Bruce; Mulaudzi, Anza-Tshilidzi (2023). SU(2)L triplet scalar as the origin of the 95 GeV excess? Physical review D, 108(9):L091704.

Abstract

We explore the possibility that an SU(2)L triplet scalar with hypercharge Y=0 is the origin of the 95 GeV diphoton excess. For a small mixing angle with the Standard Model Higgs, its neutral component has naturally a sizable branching ratio to γγ such that its Drell-Yan production via pp→W∗→HH± is sufficient to obtain the desired signal strength, where H± is the charged Higgs component of the triplet. The predictions of this setup are (1) The γγ signal has a pT spectrum different from gluon fusion but similar to associated production. (2) Photons are produced in association with tau leptons and jets, but generally do not fall into the vector-boson fusion category. (3) The existence of a charged Higgs with mH±≈(95±5)  GeV leading to σ(pp→ττνν)≈0.4  pb, which is of the same level as the current limit and can be discovered with Run 3 data. (4) A positive definite shift in the W mass as suggested by the current global electroweak fit.

Abstract

We explore the possibility that an SU(2)L triplet scalar with hypercharge Y=0 is the origin of the 95 GeV diphoton excess. For a small mixing angle with the Standard Model Higgs, its neutral component has naturally a sizable branching ratio to γγ such that its Drell-Yan production via pp→W∗→HH± is sufficient to obtain the desired signal strength, where H± is the charged Higgs component of the triplet. The predictions of this setup are (1) The γγ signal has a pT spectrum different from gluon fusion but similar to associated production. (2) Photons are produced in association with tau leptons and jets, but generally do not fall into the vector-boson fusion category. (3) The existence of a charged Higgs with mH±≈(95±5)  GeV leading to σ(pp→ττνν)≈0.4  pb, which is of the same level as the current limit and can be discovered with Run 3 data. (4) A positive definite shift in the W mass as suggested by the current global electroweak fit.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Language:English
Date:20 November 2023
Deposited On:29 Dec 2023 09:57
Last Modified:28 Jun 2024 03:31
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1103/physrevd.108.l091704
Project Information:
  • : FunderDepartment of Science and Innovation, South Africa
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  • : FunderNational Research Foundation of Korea
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  • : FunderUniversity of the Witwatersrand, Johannesburg
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  • Content: Published Version
  • Language: English
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)