https://doi.org/10.1140/epjs/s11734-024-01115-4
Regular Article
Physics at Belle II
Department of Physics, Indian Institute of Technology Madras, 600036, Chennai, Tamil Nadu, India
Received:
23
January
2024
Accepted:
5
February
2024
Published online:
20
February
2024
Belle II collects data at the asymmetric electron-positron collider SuperKEKB, which operates with a centre-of-mass energy at, or close to, the mass of the 
resonance. The lies just above the kinematic threshold for B-meson-pair production, so Belle II collects a large sample of 
and 
pairs that are unaccompanied by other particles. The low-multiplicity final state and constrained kinematics allow many measurements with missing energy and neutral mesons in the final state that complement the B-physics measurements made by LHCb. In addition to B mesons, this center-of-mass energy has a similar cross section for electron-positron annihilation to 
and 
pairs, meaning Belle II also makes measurements of charm hadron and tau lepton properties. Finally, unique searches for hypothesized dark-sector particles with masses in the range 100 MeV–10 GeV are possible. This article reviews the current results from the Belle II experiment.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
