August 29, 2022 to September 4, 2022
America/New_York timezone

Probing BSM Physics in $B\to D^{*+}\ell^- \bar{\nu}$ Using Monte Carlo Simulation

Aug 30, 2022, 4:00 PM
30m
Poinsettia/Quince 

Poinsettia/Quince 

Parallel session talk HF: Heavy Flavors and the CKM Matrix

Speaker

Quinn Campagna

Description

Several experimental measurements of $b$-decays have suggested the presence of physics beyond the Standard Model (BSM). One set of such measurements are the decay modes $B\to D^{*+}\ell^- \bar{\nu}$ with $\ell = e, \mu,$ and $\tau$. A recent analysis of 2019 Belle data found $\Delta A_{FB} = A_{FB}(B\to D^{*} \mu\nu) - A_{FB} (B\to D^{*} e \nu)$ to be
$4.1\sigma$ away from the SM prediction. Improved simulation and analysis tools are needed in order to more e ectively probe these new physics (NP) possibilities. We have developed a
Monte-Carlo event generator tool based on the EVTGEN framework to simulate NP signatures in $B\to D^{*+}\ell^- \bar{\nu}$, which arise due to the interference between the SM and NP amplitudes. We have also simulated several example NP scenarios which are able to explain the $\Delta A_{FB}$ anomaly, while remaining consistent with experimental constraints. We also show that $\Delta$-type observables allow for de nite signals of NP by removing most QCD uncertainties from the form factors, and introduce several correlated bservables that allow for more sensitivity to NP.

Primary author

Presentation materials