Speaker
Description
In this talk we estimate the potential size of the weak annihilation amplitudes in QCD factorization as allowed by experimental data by establishing a connection between the amplitudes in the QCD factorization and the so-called topological and SU(3)-invariant descriptions. Our approach is based purely on the analysis of the tensor structure of the decay amplitudes. By focusing on the decay processes to two pseudoscalar mesons B→PP, and by considering data from CP asymmetries and branching fractions, we perform a global fit to the SU(3)-irreducible quantities. Then, we translate the outcome to the QCD factorization decomposition, and find that the most constrained weak annihilation amplitudes are below 4%. But, in view of the large uncertainties in several of the experimental input parameters, values up to 30% are allowed in certain cases.
