https://doi.org/10.1140/epjc/s10052-022-11028-y
Regular Article - Theoretical Physics
Scrutinizing the 95–100 GeV di-tau excess in the top associated process
1
Institute for Theoretical Particle Physics (TTP), Karlsruhe Institute of Technology (KIT), Engesserstraße 7, 76131, Karlsruhe, Germany
2
Institute for Astroparticle Physics (IAP), KIT, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
3
Institute for Advanced Research, Nagoya University, 464-8601, Nagoya, Japan
4
Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, 464-8602, Nagoya, Japan
5
Theory Center, IPNS, High Energy Accelerator Research Organization (KEK), 1-1 Oho, 305-0801, Tsukuba, Japan
6
Department of Physics, Kindai University, Higashi-Osaka, 577-8502, Osaka, Japan
Received:
16
May
2022
Accepted:
12
November
2022
Published online:
21
November
2022
Recently, the CMS collaboration has reported a di-tau excess with a local significance of 2.6–3.1
where the invariant mass is 
–100 GeV. This excess can be interpreted as a light scalar boson that couples to the third generation fermions, particularly top and 
. Based on the simplest model that can account for the CMS di-tau excess, we evaluate experimental sensitivities to the additional light resonance, using the results reported by the ATLAS collaboration. We see that a search for the top-quark associated production of the SM Higgs boson that decays into 
sets a strong model-independent limit. We also find that the CP-even scalar interpretation of the light resonance is excluded by the ATLAS results, while the CP-odd interpretation is not.
© The Author(s) 2022
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