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dc.contributor.authorLees, J. P.en_US
dc.contributor.authorPoireau, V.en_US
dc.contributor.authorTisserand, V.en_US
dc.contributor.authorGrauges, E.en_US
dc.contributor.authorPalano, A.en_US
dc.contributor.authorEigen, G.en_US
dc.contributor.authorStugu, B.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorBaBar Collaborationen_US
dc.date.accessioned2014-11-11T17:17:21Z
dc.date.available2014-11-11T17:17:21Z
dc.date.created2014-05-30en_US
dc.date.issued2014-05-30en_US
dc.identifier.issn0031-9007en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4162
dc.descriptionSupplemental materials available at: http://goo.gl/gyli42en_US
dc.description.abstractWe 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
dc.language.isoen_USen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevLett.112.211802
dc.rights©2014 American Physical Societyen_US
dc.sourcePhysical Review Letters
dc.subjectBranching fractions (Nuclear physics)en_US
dc.subjectB mesonsen_US
dc.subjectCP violation (Nuclear physics)en_US
dc.subjectDileptonsen_US
dc.subjectHadronsen_US
dc.titleMeasurement of the B → X₋s ℓ⁺ℓ⁻ Branching Fraction and Search for Direct CP Violation from a Sum of Exclusive Final Statesen_US
dc.typeTexten_US
dc.type.genreArticleen_US
dc.identifier.bibliographicCitationLees, 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.112.211802en_US
dc.identifier.volume112en_US
dc.identifier.issue21en_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)en_US


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