Studies of D^+ -> {eta', eta, phi} e^+ nu_e

CLEO Collaboration,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,J. Hietala,P. Zweber,S. Dobbs,Z. Metreveli,K. K. Seth, A. Tomaradze,T. Xiao,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,L. J. Pearson,E. H. Thorndike, F. Yang,S. Ricciardi,C. Thomas,M. Artuso,S. Blusk,R. Mountain,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,D. M. Asner,K. W. Edwards, K. Randrianarivony,G. Tatishvili,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,D. L. Kreinick,V. E. Kuznetsov,J. R. Patterson, D. Peterson, D. Riley, A. Ryd,A. J. Sadoff, X. Shi,W. M. Sun

PHYSICAL REVIEW D（2011）

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摘要

We report the first observation of the decay D+ -> eta'e(+)v(e) in two analyses, which combined provide a branching fraction of B(D+ -> eta'e(+)v(e)) = (2.16 +/- 0.53 +/- 0.07) x 10(-4). We also provide an improved measurement of B(D+ -> eta'e(+)v(e)) = 11.4 +/- 0.9 +/- 0.4) x 10(-4), provide the first form factor measurement, and set the improved upper limit B(D+ -> phi(+)(e)v(e)) < 0.9 x 10(-4) ( 90% C. L.).

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关键词

standard deviation,form factor

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