Measurement Of Exclusive One-Prong And Inclusive 3-Prong Branching Ratios Of The Tau-Lepton

H Albrecht,H Ehrlichmann,T Hamacher, A Kruger,A Nau, A Nippe, M Reidenbach,M Schafer,H Schroder,Hd Schulz,F Sefkow, R Wurth, Rd Appuhn,C Hast,G Herrera,H Kolanoski,A Lange,A Lindner, R Mankel,M Schieber,T Siegmund, B Spaan,H Thurn,D Topfer,A Walther,D Wegener,M Paulini,K Reim, U Volland,H Wegener, R Mundt, T Oest,W Schmidtparzefall, W Funk, J Stiewe,S Werner,S Ball, Jc Gabriel,C Geyer,A Holscher,W Hofmann,B Holzer,S Khan,Kt Knopfle,J Spengler,Di Britton,Cek Charlesworth,Kw Edwards, H Kapitza,P Krieger,R Kutschke,Db Macfarlane,Rs Orr,Pm Patel,Jd Prentice, Sc Seidel, G Tsipolitis,K Tzamariudaki,Rg Vandewater,Ts Yoon,D Ressing,S Schael, Kb Schubert, K Strahl, R Waldi,S Weseler, B Bostjancic, G Kernel,P Krizan, E Kriznic, T Podobnik,T Zivko,Hi Cronstrom,L Jonsson,V Balagura,M Danilov,A Droutskoy, B Fominykh,A Golutvin,I Gorelov,F Ratnikov,V Lubimov,P Pakhlov,A Rostovtsev,A Semenov, S Semenov,V Shevchenko, V Soloshenko, I Tichomirov, Y Zaitsev, R Childers,Cw Darden

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS（1992）

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摘要

Using the ARGUS detector at the DORIS II storage ring, we have studied tau-decays with one or three charged particles in the final state, obtaining the following values for the branching ratios: BR (tau- --> e-nu-BAR(e)nu(tau)) = (17.3 +/- 0.4 +/- 0.5)%, BR(tau- --> mu- nu-BAR(mu)-nu(tau)) = (17.2 +/- 0.4 +/- 0.5)%, BR (tau- --> pi- nu(tau) + BR (tau- --> K- nu(tau)) = (11.7 +/- 0.6 +/- 0.8)%, and BR (tau- --> 3-prong) = (13.3 +/- 0.3 +/- 0.8)%. These measurements confirm the present world averages with a precision, in each case, comparable to the error on the combination of all previous results.

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