PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - Joint T03+T10 Dark Matter + Searches for New Physics
Recent results on dark sector physics at Belle II
M. Laurenza* and  On behalf of the BELLE II collaboration
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Pre-published on: January 30, 2024
Published on: March 21, 2024
The possibility of a dark sector weakly coupling to Standard Model (SM) particles through new light mediators is explored at the Belle II experiment. We present here the latest results from searches for a long-lived (pseudo-)scalar particle in rare B decays; for a di-tau resonance in $\mu\mu\tau\tau$ final states and a complementary Belle result on a dark leptophilic scalar in $\tau$ decays. Moreover we show the search for a Z$^{\prime}$ boson decaying invisibly and the most recent study of the search for a di-muon resonance in four-muon final states.
These studies are performed on samples from data collected by the Belle II detector during 2019-2021 data taking.
DOI: https://doi.org/10.22323/1.449.0046
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