The decay $D^0 \to \bar K^0 \phi$

H. Albrecht,U. Binder,P. Böckmann,R. Glfiser,G. Harder,I. Lembke-Koppitz,W. Schmidt-Parzefall,H. Schröder,H. D. Schulz,R. Wurth,A. Yagil,J. P. Donker,Andrew Drescher,D. Kamp,U. Matthiesen,H. Scheck,B. Spaan,Johannes Spengler, D. Wegener,J. C. Gabriel,K. R. Schubert,J. Stiewe, K. Strahl,R. Waldi,S. Weseler,K. W. Edwards,W. R. Frisken,Ch. Fukunaga,D. J. Gilkinson,D. M. Gingrich,H. Kapitza,P. C. H. Kim, R. Kutchke,D. B. MacFarlane,J. A. McKenna,K. W. McLean,A. W. Nilsson,R. S. Orr,P. Padley,J. A. Parsons,P. M. Patel,J. D. Prentice,H. C. J. Seywerd,J. D. Swain,G. Tsipolitis,T.-S. Yoon,J. C. Yun,R. Ammar,D. Coppage, R E Davis,S. Kanekal,N. Kwak,B. Boŝtjanĉiĉ,G. Kernel,M. Pleŝko,Joyzef Stefan, Johannes Gisli Jonsson,A. Babaev,M. Danilov,A. Golutvin,I. Gorelov,V. Lubimov,V. Matveev,V. Nagovitsin,V. Ryltsov,A. Semenov,V. Shevchenko,V. Soloshenko,V. Tchistilin,I. Tichmirov,Yu. Zaitsev,Rory Childers,C. W. Darden,Y. Oku,H. Gennow

European Physical Journal C（1987）

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摘要

The decay $D^0 \to \bar K^0 \phi$ has been investigated using data accumulated by the ARGUS experiment, which operates at around 10 GeV centre-of-mass energies The decay $D^0 \to \bar K^0 \phi$ is a signature for flavor annihilation byW-exchange in weak decays. It is shown that this decay occurs at (15.5±3.3)% of the rate for the well established decay $D^0 \to \bar K^0 \phi$ π+π−. This translates into a branching ratio for $D^0 \to \bar K^0 \phi$ of (1.18±0.25±0.17)%

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centre of mass

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