Measurement of Branching Fractions and CP and Isospin Asymmetries in B → K^* γ

2004/06/30 by B. Aubert, R. Barate, D. Boutigny +189 · 5 citations
Economics, Econometrics and Finance · Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Geometry and complex manifolds #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Stochastic processes and financial applications #hep-ex

paper · pdf · doi:10.1103/physrevd.70.112006

published as Phys.Rev.D70:112006,2004 · Submitted to Phys. Rev. Lett 7 pages, 2 figures

arxiv created 2004/06/30 · openalex publication_date 2008/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The branching fractions of the decays B->K*0,gamma and B->K*+,gamma are measured using a sample of 88 x 10⁶ B\B events collected with the BaBar detector at the PEP-II asymmetric-energy e⁺e^- collider. We find B(B->K*0,gamma) = 3.92 +/- 0.20 (stat) +/- 0.24 (syst) x 10^-5 and B(B->K*_,gamma) = 3.87 +/- 0.28 (stat) +/- 0.26 (syst) x 10^-5. Our measurements also constrain the direct CP asymmetry to be -0.74 < A_CP(B->K*,gamma) < 0.049, and the isospin asymmetry to be -0.46 < Delata_0- < 0.146, both at the 90% confidence level.

Citations

• Study ofB±→J/ψπ±andB±→J/ψK±Decays: Measurement of the Ratio of Branching Fractions and Search for DirectCPViolation
• Measurement ofB→K*γBranching Fractions and Charge Asymmetries
• Measurement of theB+/B0production ratio from theΥ(4S)meson usingB+→J/ψK+andB0→J/ψKS0decays
• Review of particle properties

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• Rare B decays in a single Universal Extra Dimension scenario
• NEW PHYSICS UPPER BOUND ON THE BRANCHING RATIO OF Bs → l+l-γ