# Joint Annual Meeting of ÖPG and SPS 2021

August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

## 【316】Measuring the decay $B^{+}\rightarrow \rho^{0} \mu^{+} \nu_{\mu}$ at LHCb

Aug 31, 2021, 6:00 PM
15m
Room B

### Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK)

### Speaker

Veronica Soelund Kirsebom (EPFL - Ecole Polytechnique Federale Lausanne (CH))

### Description

A long standing tension between measurements of the CKM matrix element $V_{\rm ub}$ in inclusive and exclusive semileptonic decays could be due to new physics.
By using data from the LHCb experiment, we are performing a measurement of $V_{\rm ub}$ from the decay $B^{+}\rightarrow\rho^{0} \mu^{+} \nu_{\mu}$. This talk will focus on the steps toward extracting the signal yield from data. This involves the development of a multivariate algorithm used to separate signal and background, identifying and modelling important background processes and developing a stable fit of the signal and background components. Finally the future steps and challenges of the analysis will be discussed.

### Primary author

Veronica Soelund Kirsebom (EPFL - Ecole Polytechnique Federale Lausanne (CH))