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- Title
Measurements of the absolute branching fractions for D→K̄πe<sup>+</sup>ν<sub>e</sub>, D→K̄<sup>*</sup>e<sup>+</sup>ν<sub>e</sub> and determination of Γ(D<sup>+</sup>→K̄<sup>*0</sup>e<sup>+</sup>ν<sub>e</sub>)/Γ(D<sup>+</sup>→K̄<sup>0</sup>e<sup>+</sup>ν<sub>e</sub>)
- Authors
Ablikim, M.; Bai, J. Z.; Ban, Y.; Bian, J. G.; Cai, X.; Chen, H. F.; Chen, H. S.; Chen, H. X.; Chen, J. C.; Chen, J.; Chen, Y. B.; Chi, S. P.; Chu, Y. P.; Cui, X. Z.; Dai, Y. S.; Diao, L. Y.; Deng, Z. Y.; Dong, Q. F.; Du, S. X.; Fang, J.
- Abstract
Using the data of about 33 pb-1 collected at and around 3.773 GeV with the BES-II detector at the BEPC collider, we have studied the exclusive semileptonic decays D+→K-π+e+νe, D0→K̄0π-e+νe, D+→K̄*0e+νe and D0→K*-e+νe. The absolute branching fractions for the decays are measured to be BF(D+→K-π+e+νe)=(3.50±0.75±0.27)%, BF(D0→K̄0π-e+νe)=(2.61±1.04±0.28)%, BF(D+→K̄*0e+νe)=(5.06±1.21±0.40)% and BF(D0→K*-e+νe)=(2.87±1.48±0.39)%. The ratio of the vector to pseudoscalar semileptonic decay rates Γ(D+→K̄*0e+νe)/Γ(D+→K̄0e+νe) is determined to be 0.57±0.17±0.02.
- Subjects
PARTICLE decays; LEPTONS (Nuclear physics); COLLIDERS (Nuclear physics); DETECTORS; MESONS; ELECTRON-positron interactions
- Publication
European Physical Journal C -- Particles & Fields, 2006, Vol 47, Issue 1, p31
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s2006-02558-x