Nonleptonic $B_s$ to charmonium decays and their role in the determination of the ${\beta }_s$

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.

Comments: 6 pages, 1 figure. Talk given at QCD@Work 2010 -International Workshop on QCD: Theory and Experiment-, 20-23 June 2010, Martina Franca, Valle d'Itria (Italy)