Study ofCP-violating asymmetries inB0→π+π−,K+π−decays

2001/10/25 by The BABAR Collaboration, B. Aubert, H. Aubert +98 · 3 citations
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.65.051502

published as Phys.Rev.D65:051502,2002 · 8 pages, 2 figrues, submitted to Physical Review D (rapid communications)

arxiv created 2001/10/25 · openalex publication_date 2002/02/13 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the \ensuremathπ⁺\ensuremathπ^\ensuremath-CP eigenstate, and an updated measurement of the charge asymmetry in B⁰\ensuremath→K⁺\ensuremathπ^\ensuremath- decays. In a sample of 33 million \ensuremathΥ(4S)\ensuremath→BB decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65_\ensuremath-11⁺¹² \ensuremathπ⁺\ensuremathπ^\ensuremath- and 217\ifmmode±\else\textpm\fi18 K⁺\ensuremathπ^\ensuremath- candidates and measure the asymmetry parameters S_\ensuremathπ\ensuremathπ=0.03_\ensuremath-0.56^+0.53\ifmmode±\else\textpm\fi0.11, C_\ensuremathπ\ensuremathπ=\ensuremath-0.25_\ensuremath-0.47^+0.45\ifmmode±\else\textpm\fi0.14, and A_K\ensuremathπ=\ensuremath-0.07\ifmmode±\else\textpm\fi0.08\ifmmode±\else\textpm\fi0.02, where the first error is statistical and the second is systematic.

Citations

• CP-Violation in the Renormalizable Theory of Weak Interaction

Cited by

• Study ofCP-Violating Asymmetries inB0→π+π−Decays
• Improved measurement of the partial-rateCPasymmetry inB+→K0π+andB−→K0π−decays
• Phenomenology ofB→ππ,πKdecays atO(αs2β0)in QCD factorization