Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B -> K(*) l+ l-

Abstract : In a sample of 471 million BB 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 mu+mu-. We report results on partial branching fractions and isospin asymmetries in seven bins of di-lepton mass-squared. We further present CP and lepton-flavor asymmetries for di-lepton masses below and above the J/psi 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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Submitted on : Thursday, April 19, 2012 - 3:17:50 PM
Last modification on : Tuesday, May 14, 2019 - 10:47:31 AM

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J. P. Lees, V. Poireau, V. Tisserand, D. Bernard, M. Verderi, et al.. Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B -> K(*) l+ l-. Physical Review D, American Physical Society, 2012, 86, pp.032012. ⟨10.1103/PhysRevD.86.032012⟩. ⟨in2p3-00689369⟩

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