Nonleptonic $B_s$ to charmonium decays and their role in the determination of the $\beta_s$

TL;DR

This paper computes form factors for $B_s$ to $f_0(980)$ decays using light-cone QCD sum rules and analyzes nonleptonic $B_s$ decays into charmonium and light mesons to help determine the $B_s$-${ar B}_s$ mixing phase $eta_s$, considering experimental prospects and new physics hints.

Contribution

It provides the first light-cone QCD sum rule calculation of $B_s o f_0(980)$ form factors and explores their role in nonleptonic decays to measure $eta_s$.

Findings

Calculated $B_s o f_0(980)$ form factors using light-cone QCD sum rules.

Analyzed the potential of nonleptonic $B_s$ decays to access the $eta_s$ phase.

Discussed experimental feasibility and implications for new physics in the $B_s$ sector.

Abstract

This talk consists of two parts. We first present a light-cone QCD sum rule computation of the $B_s\to f_0(980)$ form factors which are necessary inputs in semileptonic and nonleptonic $B_s$ decays into $f_0(980)$. Then we analyze nonleptonic $B_s$ decays into a charmonium state and a light meson, which are potentially useful to access the $B_s$-${\bar B}_s$ mixing phase $\beta_s$. We explore the experimental feasibility of measuring these various channels, paying attention to different determinations of $\beta_s$ in view of the hints of new physics recently emerged in the $B_s$ sector.