Lees, J. P.Poireau, V.Tisserand, V.Grauges, E.Palano, A.Eigen, G.Stugu, B.Izen, Joseph M.Lou, XinchouBaBar Collaboration2014-11-112014-11-112014-05-302014-05-300031-9007http://hdl.handle.net/10735.1/4162Supplemental materials available at: http://goo.gl/gyli42We measure the total branching fraction of the flavor-changing neutral-current process B→X_s ℓ⁺ℓ⁻, along with partial branching fractions in bins of dilepton and hadronic system (X_s) mass, using a sample of 471 x 10⁶ ϒ(4S) → BB̅ events recorded with the BABAR detector. The admixture of charged and neutral B mesons produced at PEP-II2 are reconstructed by combining a dilepton pair with 10 different X_s final states. Extrapolating from a sum over these exclusive modes, we measure a lepton-flavor-averaged inclusive branching fraction ℬ(B→X_s ℓ⁺ℓ⁻) = [6.73_{-0.64}^{+0.70}(stat)_{-0.25}^{+0.34}(exp syst) ± 0.50(model syst)] x 10⁻⁶ for m_{ℓ⁺ℓ⁻}^2 > 0.1 GeV²/c⁴. Restricting our analysis exclusively to final states from which a decaying B meson's flavor can be inferred, we additionally report measurements of the direct CP asymmetry A_{CP} in bins of dilepton mass; over the full dilepton mass range, we find A_{CP} = 0.04 ± 0.11 ± 0.01 for a lepton-flavor-averaged sample.en-US©2014 American Physical SocietyBranching fractions (Nuclear physics)B mesonsCP violation (Nuclear physics)DileptonsHadronsTextLees, J. P., V. Poireau, V. Tisserand, E. Grauges, et al. 2014. "Measurement of the B → X_s ℓ⁺ℓ⁻ branching fraction and search for direct CP violation from a sum of exclusive final states." Physical Review Letters 112(21), doi: 10.1103/PhysRevLett.112.21180211221