https://doi.org/10.1140/epjc/s10052-025-14630-y
Regular Article - Theoretical Physics
96 GeV scalar boson in the 2HDM with U(1)H gauge symmetry
1
The Institute of Basic Science, Korea University, Anam-ro 145, 02841, Seoul, Korea
2
School of Physics, Korea Institute for Advanced Study (KIAS), 85 Hoegi-ro, 02455, Seoul, Korea
3
Quantum Universe Center (QUC), KIAS, 85 Hoegi-ro, 02455, Seoul, Korea
4
Department of Physics, Kindai University, 577-8502, Higashi-Osaka, Osaka, Japan
5
Department of Physics Education and RINS, Gyeongsang National University, 52828, Jinju, Korea
a
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Received:
14
December
2024
Accepted:
9
August
2025
Published online:
27
August
2025
Abstract
In this paper, we study two Higgs doublet models with gauged 
symmetry instead of the usual softly broken 
symmetry, motivated by the excesses around 96 GeV reported by the CMS collaboration in the searches for light resonances decaying to two photons and two 
’s. In this model, one Higgs doublet field is charged under the symmetry, thereby one can avoid tree-level flavor changing neutral currents. The extra gauge symmetry requires extra chiral fermions, in order to satisfy the anomaly-free conditions. We analyze the signals of the light resonances, taking into account the contribution of the extra fermions, and discuss the consistency with the experimental results in this model.
© The Author(s) 2025
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