Improved measurement of the partial-rateCPasymmetry inB+→K0π+andB−→K0π−decays

2003/04/24 by Y. Unno, K. Suzuki, K. Abe +93 · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevd.68.011103

published as Phys.Rev.D68:011103,2003 · 7 pages, 8 figures, submitted to Phys. Rev. D

arxiv created 2003/04/24 · openalex publication_date 2003/07/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report an improved measurement of the partial-rate CP asymmetry in B^\ifmmode±\else\textpm\fi\ensuremath→K⁰\ensuremathπ^\ifmmode±\else\textpm\fi decays. The analysis is based on a data sample of 85\ifmmode×\else\texttimes\fi10⁶ BB pairs collected at the \ensuremathΥ(4S) resonance with the Belle detector at the KEKB e⁺e^\ensuremath- storage ring. We measure A_CP(K⁰\ensuremathπ^\ifmmode±\else\textpm\fi)=0.07_\ensuremath-0.08^+0.09_\ensuremath-0.03^+0.01, where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is \ensuremath-0.10<A_CP(K⁰\ensuremathπ^\ifmmode±\else\textpm\fi)<0.22.

Citations

• Study ofCP-violating asymmetries inB0→π+π−,K+π−decays
• Evidence forCP-violating asymmetries inB0→π+π−decays and constraints on the CKM angleφ2
• CP-Violation in the Renormalizable Theory of Weak Interaction
• Study ofCP-Violating Asymmetries inB0→π+π−Decays

Cited by

• Possibility of a large electroweak penguin contribution inB→Kπmodes