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Probing a 2HDM type-I light Higgs state via HSM→hh→bb¯γγ at the LHC

A. Arhrib1,2,*, S. Moretti3,4,†, S. Semlali3,5,‡, C. H. Shepherd-Themistocleous5,§, Y. Wang6,7,∥, and Q. S. Yan8,9,¶

  • *Contact author: aarhrib@uae.ac.ma
  • †Contact author: s.moretti@soton.ac.uk,stefano.moretti@physics.uu.se
  • ‡Contact author: souad.semlali@soton.ac.uk
  • §Contact author: claire.shepherd@stfc.ac.uk
  • ∥Contact author: wangyan@imnu.edu.cn
  • Contact author: yanqishu@ucas.ac.cn
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Phys. Rev. D 111, 095035 – Published 30 May, 2025

DOI: https://doi.org/10.1103/p3rg-ltlw

Abstract

We study the discovery potential for a light Higgs boson via gg→HSM−like→hh→bb¯γγ process at the Large Hadron Collider (LHC). Focusing on the 2-Higgs Doublet Model Type-I, which can accommodate light neutral Higgs states, of O(100)  GeV or less in mass, while agreeing with theoretical and up-to-date experimental constraints, we explore the feasibility of a light CP-even Higgs state h via the largely unexplored final state bb¯γγ at Run-3 of the LHC. We further propose a few benchmark points for future searches.

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Phys. Rev. D 111, 095035– Published 30 May, 2025
  • Received 18 March 2025
  • Accepted 8 May 2025
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