Regular Article - Theoretical Physics
Scrutinizing the 95–100 GeV di-tau excess in the top associated process
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
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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