2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Branching fraction and CP asymmetry measurements in inclusive B -> Xs gamma and B -> Xs l+l- decays

5 Jul 2014, 15:45
Sala 3+4 ()

Sala 3+4

Oral presentation Flavour Physics Flavour Physics


Prof. Gerald Eigen (University fo Bergen)


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)

Presentation Materials


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