2000/01/28 by R. Godang, K. Kinoshita, CLEO Collaboration +98 · 101 citations
Mathematics · Physics and Astronomy · #Amplitude #Combinatorics #High-Energy Particle Collisions Research #Mathematics #Mixing (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.84.5038
published in Physical Review Letters 84(22), 5038-5042 (American Physical Society) · 13 pages, 3 figures, submitted to Phys. Rev. Lett
arxiv created 2000/01/28 · openalex publication_date 2000/05/29 · arxiv updated 2010/04/08 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/05
We have studied the ``wrong-sign'' process D0\ensuremath→K+\ensuremathπ^\ensuremath- to search for D0\ensuremath-D0 mixing. The data come from 9.0fb^\ensuremath-1 of e+e^\ensuremath- collisions at √(s)\ensuremath≈10GeV recorded with the CLEO II.V detector. We measure the relative rate of the wrong-sign process D0\ensuremath→K+\ensuremathπ^\ensuremath- to the Cabibbo-favored process D0\ensuremath→K+\ensuremathπ^\ensuremath- to be R\phantom\rule0ex0ex=\phantom\rule0ex0ex(0.332_\ensuremath-0.065+0.063\ifmmode±\else\textpm\fi0.040)%. We study D0\ensuremath→K+\ensuremathπ^\ensuremath- as a function of decay time to distinguish direct doubly Cabibbo-suppressed decay from D0\ensuremath-D0 mixing. The amplitudes that describe D0\ensuremath-D0 mixing, x^\ensuremath' and y^\ensuremath', are consistent with zero. At the 95% C.L. and without assumptions concerning charge-parity ( CP) violating parameters, we find (1/2)x^\ensuremath'2<0.041% and \ensuremath-5.8%<y^\ensuremath'<1.0%.