Measurement of the B -> Xs l+ l- branching fraction with a sum over exclusive modes

Abstract

We measure the branching fraction for the flavor-changing neutral-current process B -> Xs l+ l- with a sample of 89 x 10^6 Upsilon(4S) -> BBbar events recorded with the BaBar detector at the PEP-II e+e- storage ring. The final state is reconstructed from e+e- or mu+mu- pairs and a hadronic system consisting of one K or K0s and up to two pions, with at most one pi0. We observe a signal of 40 +/- 10(stat) +/- 2(syst) events and extract the inclusive branching fraction B(B -> Xs l+ l-) = (5.6 +/- 1.5(stat) +/- 0.6(exp syst) +/- 1.1(model syst)) x 10^-6 for mll > 0.2 GeV/c^2.

7 pages, 2 postscript figures, new version as will appear in Phys.Rev.Lett., results are unchanged

References in corpus (11)

• The BABAR Detector
• A Comparative Study of the Decays $B\to (K,K^{\ast }){\ell }^{+}{\ell }^{-}$ in Standard Model and Supersymmetric Theories
• Branching Fraction and Photon Energy Spectrum b -> s gamma
• Improved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays
• Present Status of Inclusive Rare B Decays
• A Study of Time-Dependent CP-Violating Asymmetries and Flavor Oscillations in Neutral B Decays at the Upsilon(4S)
• The rare decay B --> X_s l^+ l^- to NNLL precision for arbitrary dilepton invariant mass
• Hadronic Mass Moments in Inclusive Semileptonic B Meson Decays
• Observation of $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$
• Evidence for the Rare Decay B -> K*ll and Measurement of the B -> Kll Branching Fraction
• Measurement of the Electroweak Penguin Process B --> X(s) l+ l-

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