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Measurement of the ratio Beta(D+ -> pi(0)l+nu) Beta(D+ -> (K)over-bar(o)l+nu)
Ammar, Raymond G. Ball, S. Baringer, Philip S. Coppage, Don Copty, N. Davis, Robin E. P. Hancock, N. Kelly, M. Kwak, Nowhan Lam, H.
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
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Abstract
Using the CLEO-II detector, the branching ratio of the Cabibbo suppressed decay D+ --> pi0l+nu, relative to the branching ratio of the Cabibbo favored decay D+ --> K0l+nuBAR, is measured to be B(D+ --> pi0l+nu)/B(D+ --> K0l+nuBAR) = (8.5 +/- 2.7 +/- 1.4)%. From this ratio, the product of the ratio of Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, \V(cd)/V(cs)\2, and the form factors at q2 = 0, \f+pi(0)/f+K(0)\2, is determined to be \V(cd)/V(cs)\2\f+pi(0)/f+K(0)\2 = 0.085 +/- 0.027 +/- 0.014.
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1993-08
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AMERICAN PHYSICAL SOC
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p1311_1.pdf
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ALAM, MS, KIM, IJ, et al. Measurement of the ratio Beta(D+ -> pi(0)l+nu) Beta(D+ -> (K)over-bar(o)l+nu). PHYSICAL REVIEW LETTERS. August 1993. 71(9) : 1311-1315