Measurements of Absolute Hadronic Branching Fractions and the Decay Constant in D Decays at Cleo-C

Details Measurements of Absolute Hadronic Branching Fractions and the Decay Constant in D Decays at Cleo-C Measurements of Absolute Hadronic Branching Fractions and the Decay Constant in D Decays at Cleo-C

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf.1188r&link_type=abstract

HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi

Physics

High Energy Physics

Scientific paper

I report new, preliminary, results from the CLEO-c experiment. The results presented here are based on (57.2±1.7) pb-1 of e+e- collision data taken at √ {s} = 3.77GeV. For the leptonic decay D+ → μ+ν we obtain the branching fraction ℬ(D+ → μ+νν) = (3.5± 1.4±0.6) × 10-4 which allow us to extract the decay constant fD+ = (201 ± 41 ± 17) MeV. We have also measured the hadronic branching fractions ℬ(D0 → K-π+) = (3.92±0.08±0.23)%, ℬ(D0 → K-π+π0) = (14.3±0.3±1.0)%, ℬ(D0 → K-π+π+π-) = (8.1±0.2±0.9)%, ℬ(D+ → K-π+π+) = (9.8±0.4±0.8)%, {B}(D+ -> KS0π ^+) = (1.61 ± 0.08 ± 0.15)%, and the cross section σ (e+ e- -> Dbar {D}) = (0.06 ± 0.13 ± 0.23) nb.

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