| Issue |
EPJ Web Conf.
Volume 282, 2023
8th International Symposium on Symmetries in Subatomic Physics (SSP 2022)
|
|
|---|---|---|
| Article Number | 01001 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1051/epjconf/202328201001 | |
| Published online | 03 April 2023 | |
https://doi.org/10.1051/epjconf/202328201001
Lepton Flavor Universality at Belle and Belle II
Iowa State University and High Energy Accelerator Research Organization
* e-mail: seema.choudhury@kek.jp
Published online: 3 April 2023
We report the test of lepton flavor universality at Belle and Belle II experiments considering b → c and b → s transitions. We use 711 fb−1 and 189 fb−1 of data collected at 𝒴(4S ) resonance from electron-positron collisions for Belle and Belle II, respectively. For the b → c transition, we present the measurement of lepton-flavor-universality in B0 → D*−ℓ+νℓ decay, exclusive measurement of ℛ(D) & ℛ(D*) in Belle data, and inclusive ℛ(Xe/µ) in Belle II. For the b → s transitions, we provide measurements of RK and RK* using Belle data, measurement of the branching fraction for the decay B → K*ℓℓ, and test of lepton-flavor-universality in B → J/ψK using Belle II data. Additionally, we report the lepton-flavor-universality in 
→ Ω−ℓ+νℓ decay using 922 fb−1 of data collected by the Belle detector.
© The Authors, published by EDP Sciences, 2023
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