# EPS-HEP2021 conference

26-30 July 2021
Zoom
Europe/Berlin timezone

## Study of Lepton Flavor Universality in electroweak penguin $B$ decays

Not scheduled
20m
Zoom

#### Zoom

Poster Flavour Physics and CP Violation

### Speaker

Shohei Nishida (BELLE (BELLE II Experiment))

### Description

The electroweak penguin $B$ decays mediated by $b \to s \ell^{+} \ell^{-}$ transitions are flavour-changing neutral current processes, and are thus sensitive to new physics because of possible contributions of heavy particles in the quantum loop. We report measurements of lepton flavor universality violation observables $R_{K}$ and $R_{K^{*}}$, and other related decays, based on the full data sample recorded by Belle at the $\Upsilon(4S)$ resonance from $e^{+} e^{-}$ collisions produced by the KEKB collider. We also present a search for charged lepton flavor violation and radiative lepton flavor violation in $\Upsilon(1S)$ decays using $158 \times 10^{6}$ $\Upsilon(2S)$ decays collected by the Belle detector.

Collaboration / Activity Belle

### Primary author

Shohei Nishida (BELLE (BELLE II Experiment))

### Presentation Materials

There are no materials yet.