2022 CAP Congress / Congrès de l'ACP 2022

(G*) A study of hadronic tagged B→D(∗)ℓν at the Belle II experiment

6 Jun 2022, 11:00

15m

MDCL 1105 (McMasterUniversity)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Particle Physics / Physique des particules (PPD) M1-9 Exploring the Energy and Precision Frontier I (PPD) | Exploration de la frontière d'énergie et de précision I (PPD)

Speaker

Hannah Wakeling (McGill University)

Description

With only 0.5% of the full projected $50{\text{ab}}^{-1}$ dataset, the Belle II detector is already a competitive high luminosity environment in which to study $B$ decays with missing energy. At a centre of mass energy of the $\mathrm{{\rm Y}}(4S)$ resonance, Belle II is a $B$ factory, producing approximately $1.1\times {10}^9$ $B\overline{B}$ pairs per ${\text{ab}}^{-1}$. Precise knowledge of one fully reconstructed $B$ meson through the hadronic Full Event Interpretation (FEI) tagging algorithm provides strong constraints for any signal decay studied using the other $B$ meson in the $B\overline{B}$ pair. In this talk, recent measurements of the signal decay $B\to D^{(\ast )}\ell \nu$ will be examined alongside the prospects of the $R(D)$ and $R(D^{\ast })$ measurements, in which Belle II anticipates a result of unprecedented precision with as little as $5{\text{ab}}^{-1}$ of data, and a sensitivity that could exhibit indirect New Physics effects.

Presentation materials

hmw_BtoDstEllNu_CAP2022.pdf