Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Improved studies of B—>D(*) tau nu with vertexing at Belle II

Jul 7, 2018, 2:45 PM
15m
203 (COEX, Seoul)

203

COEX, Seoul

Parallel Beyond the Standard Model Beyond the Standard Model

Speaker

Abi Soffer (Tel Aviv University (IL))

Description

BABAR, Belle, and LHCb measure the rates for the decays $B \to D^{(*)} \tau \nu$ and $B_c\to J/\psi \tau \nu$ to be higher than the SM expectations, with a combined discrepancy of $4.1 \sigma$ (for $B \to D^{(*)} \tau \nu$ only) or $\sim 4.3 \sigma$ (including all modes). In the coming years, Belle II and LHCb will greatly improve the measurement precision, to the level that systematic uncertainties associated with the background $B \to D^{**} \ell \nu$ become critical. We show how to utilize Belle II's high spatial resolution to obtain a model-independent handle on this background and improve the overall signal-backgroud. We also study the impact of vertexing on Belle II’s capability to perform this measurement with the decay $\tau \to 3 \pi \nu$, as already demonstrated by LHCb.

Primary authors

Ida Peruzzi (Laboratori Nazionali di Frascati dell'INFN) Abi Soffer (Tel Aviv University (IL))

Presentation materials