A Measurement Of The Inclusive Semileptonic Decay Fraction Of Charmed Hadrons H Albrecht , H Ehrlichmann , T Hamacher , A Kruger , A Nau , A Nippe , M Reidenbach , M Schafer , H Schroder , H Schulz , F Sefkow , R Wurth , R D Appuhn , C Hast , G Herrera , H Kolanoski , Alex J 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 , Stephen G Ball , J C Gabriel , C Geyer , A H Holscher , W Hofmann , B Holzer , Sadia Afrin Khan , K T Knopfle , J Spengler , D Britton , C E K Charlesworth , K W Edwards , H Kapitza , P Krieger , R Kutschke , D B Macfarlane , R S Orr , P M Patel , J D Prentice , S Seidel , G Tsipolitis , K Tzamariudaki , R G Van De Water , T S Yoon , D Resing , S Schael , M Schmidtler , Marlon R Schneider , K R Schubert , K Strahl , R Waldi , S Weseler , B Bostjancic , G Kernel , P Križan , E Križnic , T Podobnik , T živko , H I Cronstrom , L Jonsson , V Balagura , M Danilov , A Droutskoy , B Fominykh , A Golutvin , I Gorelov , F Ratnikov , V Lubimov , A Rostovtsev , A Semenov , S Semenov , V Shevchenko , V Soloshenko , I Tichomirov , Yu Zaitsev , R Childers , C W Darden PHYSICS LETTERS B（1992）
摘要
Using the ARGUS detector at the DORIS-II storage ring at DESY, we have measured the inclusive semileptonic branching ratio of charmed hadrons produced in e+e- annihilation at square-root s = 10 GeV to be BR(c --> ev(e)X) = (9.8 +/- 0.9 +/- 0.5(0.6)% and BR(c --> mu-v(mu)X) = (8.6 +/- 1.7 +/- 0.7(0.8))%.
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