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arxiv: 1204.3933 · v2 · submitted 2012-04-17 · ✦ hep-ex

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

The BABAR Collaboration
Authors on Pith no claims yet
classification ✦ hep-ex
keywords asymmetriesbranchingfractionsdecaysdi-leptonisospinlepton-flavorpartial
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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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