2004/08/25 by B. Aubert, BABAR Collaboration, R. Barate +98 · 12 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.94.161803
published as Phys.Rev.Lett.94:161803,2005 · 7 pages, 2 postscript figues, submitted to Phys. Rev. Lett
arxiv created 2004/08/25 · openalex publication_date 2005/04/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227\ifmmode×\else\texttimes\fi106 \ensuremathΥ(4S)\ensuremath→BB decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2\ensuremathβ in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B0 or B0 from its decay products. We measure sin2\ensuremathβ=0.722\ifmmode±\else\textpm\fi0.040(stat)\ifmmode±\else\textpm\fi0.023(syst) in agreement with the standard model expectation.