24–28 Mar 2025
Europe/Zurich timezone

Discovery Potential of Future Electron-Positron Colliders for a 95 GeV Scalar

27 Mar 2025, 10:10
20m
Pacific 1

Pacific 1

Future Experiments WG3/6: Joint session

Speakers

Dr Andreas Crivellin (Paul Scherrer Institut, Villigen)Dr Mukesh Kumar (University of the Witwatersrand, Johannesburg) Pramod Sharma

Description

The observed indications of a new scalar resonance around 95 GeV, initially reported by LEP and supported by CMS and ATLAS in di-photon, $\tau\tau$, and $W^+W^-$ channels, motivate exploring its discovery potential at future electron-positron colliders. This study focuses on the production of the new scalar (S) in $e^+e^- \to ZS$ process with $Z \to \mu^+\mu^-$ and $S \to b\bar{b}$ and optimize the signal using the recoil-mass method. By employing deep neural networks for signal-background discrimination, we demonstrate that a 95 GeV scalar, mixing with the Standard Model Higgs by an angle of $\sim 0.1$, can be observed with $5\sigma$ significance at $\sqrt{s} = 250$ GeV and 200 GeV for 5 ab$^{-1}$ of integrated luminosity.

Authors

Dr Andreas Crivellin (Paul Scherrer Institut, Villigen) Prof. Bruce Mellado (niversity of the Witwatersrand, Johannesburg,) Dr Mukesh Kumar (University of the Witwatersrand, Johannesburg) Pramod Sharma

Presentation materials