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.

16 pages, 14 figures, accepted by Phys. Rev. D

References in corpus (4)

• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Differential branching fraction and angular analysis of the decay ${\mathbf{B}}^0\to {\mathbf{K}}^{\ast 0}{\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$
• $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ in soft-collinear effective theory
• Probe R-parity Violating Supersymmetry Effects in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and $B_s\to {\ell }^{+}{\ell }^{-}$ Decays

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