| Issue |
EPJ Web Conf.
Volume 312, 2024
22nd Conference on Flavor Physics and CP Violation (FPCP 2024)
|
|
|---|---|---|
| Article Number | 04007 | |
| Number of page(s) | 8 | |
| Section | Heavy Quark Decays and CKM | |
| DOI | https://doi.org/10.1051/epjconf/202431204007 | |
| Published online | 20 November 2024 | |
https://doi.org/10.1051/epjconf/202431204007
Measurements of lepton-flavour universality in semileptonic B decays at Belle and Belle II
1 Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy
2 INFN Sezione di Trieste, I-34127 Trieste, Italy
* e-mail: michele.mantovano@ts.infn.it
Published online: 20 November 2024
The Belle and Belle II experiments have collected a 1.1 ab−1 sample of e+e− BB¯ collisions at the ϒ(4S ) resonance. These data, with low particle multiplicity, constrained initial state kinematics and excellent lepton identification, are an ideal environment to study lepton-flavour universality in semileptonic decays of the B meson. We present measurements of branching-fraction ratios that test the universality of τ and light leptons, using both exclusive and inclusive B semileptonic decays. We also report measurements of angular observables that probe universality between electrons and muons.
© The Authors, published by EDP Sciences, 2024
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