Search forD0−D¯0Mixing and a Measurement of the Doubly Cabibbo-Suppressed Decay Rate inD0→KπDecays

2003/04/04 by The BABAR Collaboration, R. Barate, B. Aubert +98 · 2 citations
Physics and Astronomy · #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.91.171801

published as Phys.Rev.Lett.91:171801,2003 · 7 pages, 3 postscript figures, submitted to Physical Review Letters

arxiv created 2003/04/04 · openalex publication_date 2003/10/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We present results of a search for D⁰\mathrm\text\ensuremath-D⁰ mixing and a measurement of R_D, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, using D⁰\ensuremath→K⁺\ensuremathπ^\ensuremath- decays from 57.1 fb^\ensuremath-1 of data collected near √(s)=10.6 GeV with the BABAR detector at the PEP-II collider. At the 95% confidence level, allowing for CP violation, we find the mixing parameters x^\ensuremath'2<0.0022 and \ensuremath-0.056<y^\ensuremath'<0.039, and the mixing rate R_M<0.16%. In the limit of no mixing, R_D=[0.357\ifmmode±\else\textpm\fi0.022(stat)\ifmmode±\else\textpm\fi0.027(syst)]% and the CP-violating asymmetry A_D=0.095\ifmmode±\else\textpm\fi0.061(stat)\ifmmode±\else\textpm\fi0.083(syst).

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• Measurement of the Wrong-Sign DecaysD0→K+π−π0andD0→K+π−π+π−, and Search forCPViolation
• Effect ofD−D¯mixing on the measurement ofγinB→DKdecays