Giuseppe Eugenio Bruno

Nonleptonic B[sub s] to charmonium decays and their role in the determination of the β[sub s]

This talk consists of two parts. We first present a light‐cone QCD sum rule computation of the Bs→f0(980) form factors which are necessary inputs in semileptonic and nonleptonic Bs decays into f0(980). Then we analyze nonleptonic Bs decays into a charmonium state and a light meson, which are potentially useful to access the Bs‐Bs mixing phase βs. We explore the experimental feasibility of measuring these various channels, paying attention to different determinations of βs in view of the hints of new physics recently emerged in the Bs sector.This talk consists of two parts. We first present a light-cone QCD sum rule computation of the B{sub s{yields}}f{sub 0}(980) form factors which are necessary inputs in semileptonic and nonleptonic Bs decays into f{sub 0}(980). Then we analyze nonleptonic B{sub s} decays into a charmonium state and a light meson, which are potentially useful to access the B{sub s}-B-bar{sub s} mixing phase {beta}{sub s}. We explore the experimental feasibility of measuring these various channels, paying attention to different determinations of {beta}{sub s} in view of the hints of new physics recently emerged in the B{sub s} sector.

Hadronic Matrix Elements with Heavy Quarks: The Charm-Loop Effect in B→K[sup (∗)][script-l][sup +][script-l][sup −]

I present the summary of our recent work [1] on the long‐distance effect in B→K(*)l+l−, generated by the four‐quark operators with charmed quarks. In addition to the factorized cc loop, the soft‐gluon emission from the loop is calculated in the framework of light‐cone OPE, applying light‐cone QCD sum rules. The resulting contribution of this effect to the B→K(*)l+l−, decay amplitude is cast in a form of the correction to the leading Wilson coefficient C9.