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Measurement of B(D+-->K(*0)l(+)nu(l)) |
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| Authors: | Brandenburg G Ershov A Kim D Y-J Wilson R Benslama K Eisenstein B I Ernst J Gollin G D Hans R M Karliner I Lowrey N Marsh M A Plager C Sedlack C Selen M Thaler J J Williams J Edwards K W Ammar R Besson D Zhao X Anderson S Frolov V V Kubota Y Lee S J Li S Z Poling R Smith A Stepaniak C J Urheim J Ahmed S Alam M S Jian L Saleem M Wappler F Eckhart E Gan K K Gwon C Hart T Honscheid K Hufnagel D Kagan H Kass R Pedlar T K Thayer J B Von Toerne E Wilksen T Zoeller M M Richichi S J Severini H Skubic P Dytman S A Nam S Savinov V Chen S Hinson J W Lee J Miller D H Pavlunin V Shibata E I Shipsey I P J |
| Affiliation: | Harvard University, Cambridge, Massachusetts 02138, USA. |
| Abstract: | Using 13.53 fb(-1) of CLEO data, we have measured the ratios of the branching fractions R(+)(e),R(+)(mu) and the combined branching fraction ratio R(+)(l), defined by R(+)(l)=B(D+-->K(*0)l(+)nu(l))]/B(D+-->K-pi(+)pi(+))]. We find R(+)(e)=0.74+/-0.04+/-0.05, R(+)(mu)=0.72+/-0.10+/-0.05, and R(+)(l)=0.74+/-0.04+/-0.05, where the first and second errors are statistical and systematic, respectively. The known branching fraction B(D+-->K-pi(+)pi(+)) leads to B(D+-->K(*0)e(+)nu(e))=(6.7+/-0.4+/-0.5+/-0.4)%, B(D+-->K(*0)mu(+)nu(mu))=(6.5+/-0.9+/-0.5+/-0.4)%, and B(D+-->K(*0)l(+)nu(l))=(6.7+/-0.4+/-0.5+/-0.4)%, where the third error is due to the uncertainty in B(D+-->K-pi(+)pi(+)). |
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