# 2019 CAP Congress / Congrès de l'ACP 2019

2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

## $R(D^{(*)})$ measurement at the Belle II Detector

Jun 5, 2019, 11:15 AM
15m
HC 114 (Simon Fraser University)

### HC 114

#### Simon Fraser University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Particle Physics / Physique des particules (PPD)

### Speaker

Hannah Wakeling (Belle II Group at McGill University)

### Description

The Belle II detector is a significant upgrade of the Belle detector and will be a competitive, perhaps unique, environment in which to study rare B decays with missing energy to a sensitivity that would exhibit indirect New Physics effects. From a $B$-$\bar{B}$ meson pair that has been produced in the SuperKEKB energy-asysmmetric $e^+e^-$ collider and $B$-factory, one $B$ meson can be fully reconstructed through powerful $B$-tagging, which in turn provides strong constraints for the other $B$ meson. The design luminosity of SuperKEKB is $8\times10^{35}\,\mbox{cm}^{-2}\,\mbox{s}^{-1}$, where the Belle II experiment aims to record $50\,\mbox{ab}^{-1}$ of data, a factor of 50 more than the original Belle experiment. This is an ideal environment in which rare decays with missing energy can be measured. The decay $B\rightarrow D^{(*)}\tau \nu$ will be examined with the prospects of the $R(D^{(*)})$ measurements, in which we anticipate a result of unprecedented precision with as little as $5\,\mbox{ab}^{-1}$ of data.

### Primary author

Hannah Wakeling (Belle II Group at McGill University)