Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons

D. M. Asner,K. W. Edwards,J. Reed,A. N. Robichaud,G. Tatishvili,E. J. White,R. A. Briere,H. Vogel,P. U. E. Onyisi, J. L. Rosner,J. P. Alexander,D. G. Cassel,S. Das,R. Ehrlich,L. Fields, L. Gibbons,S. W. Gray,D. L. Hartill,B. K. Heltsley, J. M. Hunt,D. L. Kreinick,V. E. Kuznetsov,J. Ledoux,J. R. Patterson, D. Peterson, D. Riley, A. Ryd,A. J. Sadoff, X. Shi,S. Stroiney,W. M. Sun, J. Yelton,P. Rubin, N. Lowrey,S. Mehrabyan,M. Selen,J. Wiss, M. Kornicer,R. E. Mitchell,M. R. Shepherd,C. M. Tarbert,D. Besson, T. K. Pedlar,J. Xavier,D. Cronin-Hennessy,K. Y. Gao,J. Hietala,R. Poling,P. Zweber,S. Dobbs,Z. Metreveli,K. K. Seth,B. J. Y. Tan, A. Tomaradze,S. Brisbane,J. Libby,L. Martin,A. Powell,P. Spradlin, G. Wilkinson,H. Mendez,J. Y. Ge,D. H. Miller, I. P. J. Shipsey,B. Xin,G. S. Adams,D. Hu,B. Moziak,J. Napolitano,K. M. Ecklund,J. Insler,H. Muramatsu,C. S. Park,E. H. Thorndike, F. Yang,S. Ricciardi,C. Thomas,M. Artuso,S. Blusk, S. Khalil,R. Mountain, K. Randrianarivony,T. Skwarnicki,S. Stone,J. C. Wang,L. M. Zhang,G. Bonvicini,D. Cinabro,A. Lincoln,M. J. Smith, P. Zhou,J. Zhu,P. Naik, J. Rademacker

PHYSICAL REVIEW D（2010）

引用 29|浏览95

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摘要

We have measured the inclusive semileptonic branching fractions of D-0, D+, and D-s(+) mesons. For these measurements, we have used the full CLEO-c open-charm data samples, 818 pb(-1) at E-CM = 3.774 GeV, giving D-0(D) over bar (0) and D+D- events, and 602 pb(-1) at E-CM = 4.170 GeV, giving D-s*D-+/-(s)-/+ events. We obtain B(D-0 -> Xe+nu(e)) = (6.46 +/- 0.09 +/- 0.11)%, B(D+ -> Xe+nu(e)) = (16.13 +/- 0.10 +/- 0.29)%, and B(D-s(+) -> Xe+nu(e)) = (6.52 +/- 0.39 +/- 0.15)%, where the first uncertainties are statistical and the second are systematic. From these and lifetimes obtained elsewhere, we obtain the ratios of semileptonic decay widths Gamma(D+ -> Xe+nu(e))/Gamma(D-0 -> Xe+nu(e)) = 0.985 +/- 0.015 +/- 0.024 and Gamma(D-s(+) -> Xe+nu(e))/Gamma(D-0 -> Xe+nu(e)) = 0.828 +/- 0.051 +/- 0.025. The ratio of D+ and D-0 is consistent with the isospin symmetry prediction of unity, and the ratio of D-s(+) and D-0 differs from unity, as expected.

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elementary particles

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