Measurement of the ratio B (D+ ---> pi0 lepton+ neutrino) / B (D+ ---> anti-K0 lepton+ neutrino)

Using the CLEO-II detector, the branching ratio of the Cabibbo suppressed decay D+→π0l+ν, relative to the branching ratio of the Cabibbo favored decay D+→K¯0l+ν, is measured to be B(D+→π0l+ν)/B(D+→K¯0l+ν) =(8.5±2.7±1.4)%. From this ratio, the product of the ratio of Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, ‖Vcd/Vcs‖2, and the form factors at q2=0, ‖f+π(0)/f+K(0)‖2, is determined to be ‖Vcd/Vcs‖2‖f+π(0)/f+K(0)‖2 =0.085±0.027±0.014.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
D+: electroproduction
electroproduction: D+
D+: semileptonic decay
semileptonic decay: D+
D+: branching ratio
CKM matrix matrix

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Figures(0)

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