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Measurement of the Ds(+) -> eta l(+)nu and Ds(+) → eta'l(+)nu branching ratios
Ammar, Raymond G. Baringer, Philip S. Bean, Alice Besson, David Zeke Coppage, Don Copty, N. Davis, Robin E. P. Hancock, N. Kotov, S. Kravchenko, I.
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
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Abstract
Using the CLEO II detector we measure B(D-s(+) --> eta e(+)nu)/B(D-s(+) --> phi e(+)nu) = 1.24 +/- 0.12 +/- 0.15, B(D-s(+) --> eta'e(+)nu)/B(D-s(+) --> phi e(+)nu) = 0.43 +/- 0.11 +/- 0.07, and B(D-s(+) --> eta'e(+)nu)/B(D-s(+) --> eta e(+)nu) = 0.35 +/- 0.09 +/- 0.07. We find the ratio of vector to pseudoscalar final states, B(D-s(+) --> phi e(+)nu)/B(D-s(+) --> (eta + eta')e(+)nu) = 0.60 +/- 0.06 +/- 0.06, which is similar to the ratio found in nonstrange D decays.
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1995-11
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AMERICAN PHYSICAL SOC
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BRANDENBURG, G, CINABRO, D, et al. Measurement of the Ds(+) -> eta l(+)nu and Ds(+) → eta'l(+)nu branching ratios. PHYSICAL REVIEW LETTERS. November 1995. 75(21) : 3804-3808