Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B → K^{(*)}ℓ⁺ℓ⁻

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Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B → K^{(*)}ℓ⁺ℓ⁻

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Title: Measurement of Branching Fractions and Rate Asymmetries in the Rare Decays B → K^{(*)}ℓ⁺ℓ⁻
Author(s):
Lees, J. P.;
Poireau, V.;
Tisserand, V.;
Garra Tico, J.;
Grauges, E.;
Palano, A.;
Eigen, G.;
Izen, Joseph M.;
Lou, Xinchou;
BaBar Collaboration
Format: Text
Item Type: Article
Keywords: Branching fractions (Nuclear physics)
CP violation (Nuclear physics)
Leptons (Nuclear physics)
Abstract: In a sample of 471 x 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.
Publisher: American Physical Society
ISSN: 1550-7998
Source: Physical Review D - Particles, Fields, Gravitation and Cosmology
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.86.032012
Persistent Link: http://hdl.handle.net/10735.1/3167
Bibliographic Citation: Lees, J. P., V. Poireau, V. Tisserand, J. Garra Tico, et al. 2012. "Measurement of branching fractions and rate asymmetries in the rare decays B → K^{(*)}ℓ⁺ℓ⁻." Physical Review D - Particles, Fields, Gravitation and Cosmology 86(3), doi:10.1103/PhysRevD.86.032012
Terms of Use: ©2012 American Physical Society

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