Measurement of the decay fractions of D * mesons

H. Albrecht,H. Ehrlichmann,T. Hamacher,R. P. Hofmann,T. Kirchhoff, R. Mankel,A. Nau,S. Nowak,D. Reßing,Henning Schroder,H. D. Schulz,Mark Walter,R. Wurth,C. Hast,H. Kapitza, H. Kolanoski,A. Kosche, A E Lange,A. Lindner,M. Schieber,T. Siegmund,B. Spaan,H. Thurn,D. Töpfer,D. Wegener,P. Eckstein,M. Schmidtler,Malte Schramm,K. R. Schubert, R. Schwierz,R. Waldi, M. Paulini, K. Reim,H. Wegener,R. Eckmann,H. Kuipers,O. Mai,R. Mundt,T. Oest,R. Reiner,W. Schmidt-Parzefall,J. Stiewe,S. Werner,K. Ehret,W. Hofmann,A. Hüpper,S. Khan,K. T. Knöpfle,Johannes Spengler,P. Krieger,D. B. MacFarlane,J. D. Prentice,P. R. B. Saull,K. Tzamariudaki,R. G. Van de Water,T.-S. Yoon,C. Frankl,C. Ratz,M. Schneider,S. Weseler,G. Kernel, P. Križan,E. Križnič,T. Podobnik,T. Živko,V. Balagura,I. Belyaev,V E Blinov,S. Chechelnitsky,M. Danilov,A. Droutskoy,Yu. Gershtein,A. Golutvin,I. Korolko,G. Kostina,D O Litvintsev,V. Lubimov,P. Pakhlov, S. Semenov,A. Snizhko,I. Tichomirov, A. Undrus,Yu. Zaitsev,V. Zhilich

European Physical Journal C（1995）

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摘要

Using the ARGUS detector at the DORIS II electron-positron storage ring at DESY, we have measured BR(D*+→D0π+)=(68.8±2.4±1.3)%, BR(D*+→D+π0)=(31.2±1.1±0.8)%, BR(D*+→D+γ)<5.2% (90%CL), BR(D*0→D0π0)=(59.6±3.5±2.8)%, and BR(D*0→D0γ)=(40.4±3.5±2.8)%, and the mass difference Δm0=m(D*0)−m(D0)=(142.2±0.3±0.2)MeV/c2.

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关键词

Field Theory, Elementary Particle, Quantum Field Theory, Particle Acceleration, Decay Fraction

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