Speaker
Prof.
Gerald Eigen
(University fo Bergen)
Description
We use the large dataset collected with the BABAR detector to measure the branching fractions and CP asymmetries of the inclusive decays B -> Xs l+ l- and B -> Xs gamma. We adopt a sum-of-exclusive-states method, whereby 20 different final states are selected.
The branching fraction and CP asymmetry for B -> Xs l+ l- are measured in intervals of q2 (di-lepton invariant mass) and also in bins of m(Xs), the hadronic mass. Simulation is used to extrapolate to the fully inclusive rate.
We also report the CP asymmetry for B -> Xs gamma, and the first measurement of the difference between ACP for charged and neutral decay modes, DeltaA(Xs gamma). Using the value obtained, we provide 68% and 90% confidence intervals on the imaginary part of the ratio of the Wilson coefficients corresponding to the chromo-magnetic dipole and the electromagnetic dipole transitions.
Primary author
fabio anulli
(INFN Rome)
