2004/11/30 by The BABAR Collaboration, R. Barate, B. Aubert +98
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.71.031102
published as Phys.Rev.D71:031102,2005 · 8 pages, 1 postscript figure
openalex publication_date 2005/02/15 · arxiv created 2005/03/15 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/04
We study the decays B^\ensuremath-\ensuremath→D*0\ensuremathπ^\ensuremath- and B^\ensuremath-\ensuremath→D*0K^\ensuremath-, where the D*0 decays into D0\ensuremathπ0, with the D0 reconstructed in the CP-even (CP+) eigenstates K^\ensuremath-K+ and \ensuremathπ^\ensuremath-\ensuremathπ+ and in the (non-CP) channels K^\ensuremath-\ensuremathπ+, K^\ensuremath-\ensuremathπ+\ensuremathπ+\ensuremathπ^\ensuremath-, and K^\ensuremath-\ensuremathπ+\ensuremathπ0. Using a sample of about 123\ifmmode×\else\texttimes\fi106 BB pairs, we measure the ratios of decay rates R_non\ensuremath-CP*\ensuremath≡\fracB(B^\ensuremath-\ensuremath→D_non\ensuremath-CP*0K^\ensuremath-)B(B^\ensuremath-\ensuremath→D_non\ensuremath-CP*0\ensuremathπ^\ensuremath-)=0.0813\ifmmode±\else\textpm\fi0.0040(stat)_\ensuremath-0.0031+0.0042(syst), and provide the first measurements of RCP+*\ensuremath≡\fracB(B^\ensuremath-\ensuremath→DCP+*0K^\ensuremath-)B(B^\ensuremath-\ensuremath→DCP+*0\ensuremathπ^\ensuremath-)=0.086\ifmmode±\else\textpm\fi0.021(stat)\ifmmode±\else\textpm\fi0.007(syst), and of the CP asymmetry ACP+*\ensuremath≡\fracB(B^\ensuremath-\ensuremath→DCP+*0K^\ensuremath-)\ensuremath-B(B+\ensuremath→DCP+*0K+)B(B^\ensuremath-\ensuremath→DCP+*0K^\ensuremath-)+B(B+\ensuremath→DCP+*0K+)=\ensuremath-0.10\ifmmode±\else\textpm\fi0.23(stat)_\ensuremath-0.04+0.03(syst).