Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 76: Search for Dark Matter 3

T 76.9: Vortrag

Mittwoch, 23. März 2022, 18:15–18:30, T-H35

Search for axion-like particles (ALPs) at Belle II experiment. — •Awais Bin Zahid, Pablo Goldenzweig, and Torben Ferber — Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

One possible extension of the Standard Model (SM), which may contribute in solving the mystery of Dark Matter (DM) and/or explain some astrophysical anomalies, are Axion-Like Particles (ALPs). The model taken into consideration in this search is of an ALP interacting with SM photons with a coupling strength g_aγγ and having mass m_a. The search for the direct production of such an ALP via the process (ALP-Strahlung) e⁺e⁻ → γa (a → γγ), is performed in the mass range 0.2 < m_a < 9.8 GeV/c². Given that the final state of the e⁺e⁻ → γa (a → γγ) process is fully neutral, being made up of three photons, a proper kinematic fit with neutral particles is a powerful tool to improve signal resolution. In this talk, I will present the status of sensitivity evaluation based on Monte Carlo simulation which corresponds to the data of almost 500 fb⁻¹ that will be collected by Belle II at the end of summer 2022.