"Long-distance weak annihilation contribution to B to pi/K l+ l- decays"
Dr. Pablo Roig Garcés,
CINVESTAV-IPN
We propose an alternative evaluation of the long-distance weak annihilation
contribution to the rare semileptonic B±\u2192(\u03c0±,K±)\u2113+\u2113\u2212
(\u2113=e,\u03bc) decays. This hadronic description at low energies is matched at
intermediate energies to its short-distance counterpart in terms of quark
and gluon degrees of freedom. Consequences for lepton universality,
branching ratios and CP asymmetries are discussed.