Measurements of the rare decays B -> Kl+l- and B -> K*l+l-

2005/07/01 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0507005

23 pages, 12 postscript figues, contributed to Lepton-Photon 2005

arxiv created 2005/07/01 · openalex publication_date 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We present measurements of the flavor-changing neutral current decays B -> Kl+l- and B -> K*l+l-, where l+l- is either an e+e- or mu+mu- pair. The data sample comprises 229 X 10⁶ Y(4S) -> BBbar decays collected with the BaBar detector at the PEP-II e+e- storage ring. We measure the branching fractions BF(B -> Kl+l-) = (0.34 +- 0.07 +- 0.03) X 10^-6 and BF(B -> K*l+l-) = (0.78^+0.19_-0.17 +/- 0.12) X 10^-6, the direct CP asymmetries of these decays, and the relative abundances of decays to electrons and muons.

Related

• Search for the Rare Decays B --> Kl⁺l^- and B --> K^*(892)l⁺ l^-
• Evidence for the Flavor Changing Neutral Current Decays B to K l+ l- and B to K* l+ l-
• BABAR Measurements on B->K(*)l+l- Rates and Rate Asymmetries
• Angular and Isospin Asymmetries in the Decays B->K(*)l+l-
• Measurement of B+ -> K+ tau- tau+, B -> K* l+ l- and B -> K pi+ pi- gamma decays at BABAR