Limits onD0−D¯0Mixing andCPViolation from the Ratio of Lifetimes for Decay toK−π+,K−K+, andπ−π+

2003/06/30 by The BABAR Collaboration, B. Aubert, R. Barate +98 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.1103/physrevlett.91.121801

published as Phys.Rev.Lett.91:121801,2003 · 7 pages, 2 postscript figues, submitted to Phys.Rev.Lett

arxiv created 2003/07/29 · openalex publication_date 2003/09/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We present a measurement of D⁰\mathrm\text\ensuremath-D⁰ mixing parameters using the ratios of lifetimes extracted from samples of D⁰ mesons decaying to K^\ensuremath-\ensuremathπ⁺, K^\ensuremath-K⁺, and \ensuremathπ^\ensuremath-\ensuremathπ⁺. Using 91 fb^\ensuremath-1 of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=\phantom\rule0ex0ex[0.8\ifmmode±\else\textpm\fi0.4(stat.)\genfrac0+0.5\ensuremath-0.4(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=\ensuremathΔ\ensuremathΓ/2\ensuremathΓ. Using the difference in lifetimes of D⁰ and D⁰ mesons, we obtain the CP-violation parameter \ensuremathΔY=[\ensuremath-0.8\ifmmode±\else\textpm\fi0.6(stat.)\ifmmode±\else\textpm\fi0.2(syst.)]%.

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