Measurement of the B->Xsl+l- branching fraction and search for direct CP violation from a sum of exclusive final states

Abstract

We present a measurement of the total branching fraction of the flavor-changing neutral-current process B->Xsl+l-, along with partial branching fractions in bins of dilepton and hadronic system (Xs) mass, using a sample of 471x10^6 Upsilon(4S)->BBbar events recorded with the BaBar detector at the PEP-II e+e- collider. B mesons are reconstructed by combining a dilepton pair, either e+e- or mu+mu-, with 10 different Xs final states containing exactly one charged or neutral kaon, two or fewer charged pions, and at most one pi0. Using a sum over these exclusive modes as the basis for extrapolation to the fully inclusive rate, we measure a lepton-flavor-averaged inclusive branching fraction BF(B->Xsl+l-) = (6.73 +0.70-0.64[stat] +0.34-0.25[exp syst] +/- 0.50[model syst])x10^-6 for m(l+l-)^2>0.1 GeV^2/c^4. 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 ACP in bins of dilepton mass; over the full dilepton mass range, we find ACP=0.04 +/- 0.11 +/- 0.01$ for a lepton-flavor-averaged sample.

34 pages, 25 postscript figures, accepted by PRL

References in corpus (7)

• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• 331 models facing new b -> s mu^+ mu^- data
• Logarithmically Enhanced Corrections to the Decay Rate and Forward Backward Asymmetry in anti-B --> X(s) l+ l-
• On the LHCb anomaly in B -> K* l+ l-
• Analytic calculation of two-loop QCD corrections to b\to s\ell^+\ell^- in the high q^2 region
• Penguins with Charm and Quark-Hadron Duality
• Nonperturbative m_X cut effects in B -> Xs l+ l- observables

Cited by in corpus (79)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Flavour anomalies after the $R_{K^{\ast }}$ measurement
• Interpreting Hints for Lepton Flavor Universality Violation
• Towards the discovery of new physics with lepton-universality ratios of $b\to s\ell \ell$ decays
• $R_K$ and $R_{K^{\ast }}$ beyond the Standard Model
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• Lepton Flavor Non-Universality in B-meson Decays from a U(2) Flavor Model
• Reassessing the discovery potential of the $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ decays in the large-recoil region: SM challenges and BSM opportunities
• On the anomalies in the latest LHCb data
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$ after the Measurement of $R_{K^{\ast }}$
• Reconsidering the One Leptoquark solution: flavor anomalies and neutrino mass
• Rare $B$ Decays as Tests of the Standard Model
• Diagnosing lepton-nonuniversality in $b\to s\ell \ell$
• Scalar leptoquarks and the rare B meson decays
• Global fits to b -> s ll data and signs for lepton non-universality
• To (b)e or not to (b)e: No electrons at LHCb
• Explaining the $R_K$ and $R_{D^{(\ast )}}$ anomalies with vector leptoquarks
• Phenomenology of semileptonic B-meson decays with form factors from lattice QCD
• $b\to s\ell \ell$ Global Fits after $R_{K_S}$ and $R_{K^{\ast +}}$
• Role of Tensor operators in $R_K$ and $R_{K^{\ast }}$
• A light $Z^{\prime }$ for the $R_K$ puzzle and nonstandard neutrino interactions
• New light mediators for the $R_K$ and $R_{K^{\ast }}$ puzzles
• Addressing $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$, muon $g-2$ and ANITA anomalies in a minimal $R$-parity violating supersymmetric framework
• Complete Vector-like Fourth Family and new $\mathrm{U}(1{)}^{\prime }$ for Muon Anomalies
• Explaining the Lepton Non-universality at the LHCb and CMS from a Unified Framework
• New Physics in $b\to s{\mu }^{+}{\mu }^{-}$: Distinguishing Models through CP-Violating Effects
• A "Vector-like chiral" fourth family to explain muon anomalies
• Are the CKM anomalies induced by vector-like quarks? Limits from flavor changing and Standard Model precision tests
• Measurement of Angular Asymmetries in the Decays B->K*l+l-
• Gauging the accidental symmetries of the Standard Model, and implications for the flavour anomalies
• New-physics signals of a model with a vector-singlet up-type quark
• Time dependence in $B\to V\ell \ell$ decays
• Model independent New Physics analysis in ${\Lambda }_b\to \Lambda {\mu }^{+}{\mu }^{-}$ decay
• Cornering the Two Higgs Doublet Model Type II
• Implications of hidden gauged $U(1)$ model for $B$ anomalies
• Resolving the $(g-2{)}_{\mu }$ and $B$ anomalies with leptoquarks and a dark Higgs boson
• Using ${\Lambda }_b\to \Lambda {\mu }^{+}{\mu }^{-}$ data within a Bayesian analysis of $|\Delta B|=|\Delta S|=1$ decays
• CP violation in the B system
• Predictions for Neutrinos and New Physics from Forward Heavy Hadron Production at the LHC
• New physics in $b\to s{e}^{+}{e}^{-}$?
• Rare b hadron decays at the LHC
• Anatomy of a six-parameter fit to the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• Flavor signatures of isosinglet vector-like down quark model
• New physics in $B\to K^{\ast }{\tau }^{+}{\tau }^{-}$: A model independent analysis
• $h^0\to c\bar{c}$ as a test case for quark flavor violation in the MSSM
• General squark flavour mixing: constraints, phenomenology and benchmarks
• $CP$ violation in $b\to s\ell \ell$: a model independent analysis
• $W$ mass in a model with vector-like leptons and $U(1{)}^{\prime }$
• Probing new physics through $B_s^{\ast }\to {\mu }^{+}{\mu }^{-}$ decay
• Subleading Power Factorization in $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$
• Looking for $B\to X_s{\ell }^{+}{\ell }^{-}$ in non-minimal Universal Extra Dimensional model
• Status of rare exclusive $B$ meson decays in 2018
• Predictions for $B_s\to {\bar{K}}^{\ast }\ell \ell$ in non-universal $Z^{\prime }$ models
• Direct Constraints, Flavor Physics, and Flavor Anomalies in Composite Higgs Models
• Impact of Warped Extra Dimensions on the Dipole Coefficients in $\mathbf{b}\to \mathbf{s\gamma }$ Transitions
• Correlating the CDF $W$-boson mass shift with the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• Finding flavons at colliders
• Electroweak Penguin Decays of $b$-Flavoured Hadrons
• Two-body decays of gluino at full one-loop level in the quark-flavour violating MSSM
• Rare B-Meson Decays at the Crossroads
• Isospin extrapolation as a method to study inclusive $\bar{B}\to X_s{\ell }^{+}{\ell }^{-}$ decays
• $B\to X_{{}_S}{l}^{+}{l}^{-}$ in the minimal gauged $(B-L)$ supersymmetry
• On the effective lifetime of $B_s\to \mu \mu \gamma$
• Data-driven analyses and model-independent fits for present $b\to s\ell \ell$ results
• The decays $h^0\to b\bar{b}$ and $h^0\to c\bar{c}$ in the light of the MSSM with quark flavour violation
• The impact of nonminimal Universal Extra Dimensional model on $\Delta B=2$ transitions
• Correlation between the decays $h^0\to \gamma \gamma /gg$ in the MSSM with quark flavour violation
• Explaining the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies in $Z^{\prime }$ scenarios with top-FCNC couplings
• New physics in $b\to s{e}^{+}{e}^{-}$: A model independent analysis
• Imprint of SUSY in radiative B-meson decays
• Recent BABAR Results
• Penguin and rare decays in BaBar
• Prospects for rare B decays at Belle II
• $\ge 4\mu$ signal from a vector-like lepton decaying to a muon-philic $Z^{\prime }$ boson at the LHC
• Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model
• Summary of the CKM 2014 working group on rare decays
• Impact of quark flavor violating SUSY on h(125) decays at future lepton colliders