Measurement of branching fractions and rate asymmetries in the rare decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:mo>*</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mi>ℓ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>ℓ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>
J. P. LeesLaboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, FranceV. PoireauLaboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, FranceV. TisserandLaboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, FranceJ. Garra TicoUniversitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, SpainE. GraugésUniversitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, SpainA. PalanoINFN Sezione di Bari, I-70126 Bari, ItalyG. EigenUniversity of Bergen, Institute of Physics, N-5007 Bergen, NorwayB. StuguUniversity of Bergen, Institute of Physics, N-5007 Bergen, NorwayD. N. BrownLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAL. T. KerthLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAYu. G. KolomenskyLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAG. LynchLawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USAH. KochRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyT. Vazquez SchroederRuhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, GermanyD. J. AsgeirssonUniversity of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1C. HeartyUniversity of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1T. S. MattisonUniversity of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1J. A. McKennaUniversity of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1A. KhanBrunel University, Uxbridge, Middlesex UB8 3PH, United KingdomV. E. BlinovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaА. Р. БузыкаевBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaВ. П. ДружининBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaВ. Б. ГолубевBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaE. A. KravchenkoBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaA. P. OnuchinBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaS. I. SerednyakovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaYu. I. SkovpenBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaE. P. SolodovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaK. Yu. TodyshevBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaA. N. YushkovBudker Institute of Nuclear Physics, Novosibirsk 630090, RussiaM. BondioliUniversity of California at Irvine, Irvine, California 92697, USAD. KirkbyUniversity of California at Irvine, Irvine, California 92697, USAA. J. LankfordUniversity of California at Irvine, Irvine, California 92697, USAM. MandelkernUniversity of California at Irvine, Irvine, California 92697, USAH. AtmacanUniversity of California at Riverside, Riverside, California 92521, USAJ. W. GaryUniversity of California at Riverside, Riverside, California 92521, USAF. LiuUniversity of California at Riverside, Riverside, California 92521, USAO. LongUniversity of California at Riverside, Riverside, California 92521, USAG. M. VitugUniversity of California at Riverside, Riverside, California 92521, USAC. CampagnariUniversity of California at Santa Barbara, Santa Barbara, California 93106, USAT. M. HongUniversity of California at Santa Barbara, Santa Barbara, California 93106, USAD. KovalskyiUniversity of California at Santa Barbara, Santa Barbara, California 93106, USAJ. D. RichmanUniversity of California at Santa Barbara, Santa Barbara, California 93106, USAChristopher WestUniversity of California at Santa Barbara, Santa Barbara, California 93106, USAA. M. EisnerUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAJ. KrosebergUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAW. S. LockmanUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAA. J. MartínezUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAB. A. SchummUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAA. SeidenUniversity of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USAD. S. ChaoCalifornia Institute of Technology, Pasadena, California 91125, USAC. H. ChengCalifornia Institute of Technology, Pasadena, California 91125, USAB. EchenardCalifornia Institute of Technology, Pasadena, California 91125, USAK. T. FloodCalifornia Institute of Technology, Pasadena, California 91125, USAD. G. HitlinCalifornia Institute of Technology, Pasadena, California 91125, USAP. OngmongkolkulCalifornia Institute of Technology, Pasadena, California 91125, USAF. C. PorterCalifornia Institute of Technology, Pasadena, California 91125, USAA. Y. RakitinCalifornia Institute of Technology, Pasadena, California 91125, USAR. AndreassenUniversity of Cincinnati, Cincinnati, Ohio 45221, USAZ. HuardUniversity of Cincinnati, Cincinnati, Ohio 45221, USAJ. V. MeadUniversity of Cincinnati, Cincinnati, Ohio 45221, USAM. D. SokoloffUniversity of Cincinnati, Cincinnati, Ohio 45221, USAL. SunUniversity of Cincinnati, Cincinnati, Ohio 45221, USAP. C. BloomUniversity of Colorado, Boulder, Colorado 80309, USAW. T. FordUniversity of Colorado, Boulder, Colorado 80309, USAA. GazUniversity of Colorado, Boulder, Colorado 80309, USAU. NauenbergUniversity of Colorado, Boulder, Colorado 80309, USAJ. G. SmithUniversity of Colorado, Boulder, Colorado 80309, USAS. R. WagnerUniversity of Colorado, Boulder, Colorado 80309, USAR. AyadColorado State University, Fort Collins, Colorado 80523, USAW. H. TokiColorado State University, Fort Collins, Colorado 80523, USAB. SpaanTechnische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, GermanyK. R. SchubertTechnische Universität Dresden, Institut für Kern- und Teilchenphysik, D-01062 Dresden, GermanyR. SchwierzTechnische Universität Dresden, Institut für Kern- und Teilchenphysik, D-01062 Dresden, GermanyD. BernardLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, FranceM. VerderiLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, FranceP. J. ClarkUniversity of Edinburgh, Edinburgh EH9 3JZ, United KingdomS. PlayferUniversity of Edinburgh, Edinburgh EH9 3JZ, United KingdomD. BettoniINFN Sezione di Ferrara, I-44100 Ferrara, ItalyC. BozziINFN Sezione di Ferrara, I-44100 Ferrara, ItalyR. CalabreseDipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, ItalyG. CibinettoINFN Sezione di Ferrara, I-44100 Ferrara, ItalyE. FioravantiINFN Sezione di Ferrara, I-44100 Ferrara, ItalyI. GarziaINFN Sezione di Ferrara, I-44100 Ferrara, ItalyE. LuppiDipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, ItalyM. MuneratoINFN Sezione di Ferrara, I-44100 Ferrara, ItalyM. NegriniDipartimento di Fisica, Università di Ferrara, I-44100 Ferrara, ItalyL. PiemonteseINFN Sezione di Ferrara, I-44100 Ferrara, ItalyV. SantoroINFN Sezione di Ferrara, I-44100 Ferrara, ItalyR. Baldini-FerroliINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyA. CalcaterraINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyR. de SangroINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyG. FinocchiaroINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyP. PatteriINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyI. M. PeruzziINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyM. PiccoloINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyM. RamaINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyA. ZalloINFN Laboratori Nazionali di Frascati, I-00044 Frascati, ItalyR. ContriDipartimento di Fisica, Università di Genova, I-16146 Genova, ItalyE. GuidoDipartimento di Fisica, Università di Genova, I-16146 Genova, Italy
2012lv
ABI
Аннотация
In a sample of 471×106 BB̅ events collected with the BABAR detector at the PEP-II e+e- collider we study the rare decays B→K(*)l+l-, where l+l- is either e+e- or μ+μ-. We report results on partial branching fractions and isospin asymmetries in seven bins of dilepton mass-squared. We further present CP and lepton-flavor asymmetries for dilepton masses below and above the J/ψ resonance. We find no evidence for CP or lepton-flavor violation. The partial branching fractions and isospin asymmetries are consistent with the Standard Model predictions and with results from other experiments.
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