Measurement of B(/\c->pKpi)
D. E. Jaffe, et al. (CLEO Collaboration)
TL;DR
This paper measures the branching fraction of the \/c -> p K pi decay by analyzing e+e- collision events with specific charm and antiproton tags, providing a precise experimental result.
Contribution
The study introduces a novel method to determine the \/c -> p K pi branching fraction using hemisphere tagging in e+e- collisions, combining multiple anticharm tagging techniques.
Findings
Branching fraction B(\c->pKpi) = (5.0 +/- 0.5 +/- 1.2)%
Methodology utilizes hemisphere tagging with anticharm and antiproton tags
Results improve precision over previous measurements.
Abstract
The /\c->pKpi yield has been measured in a sample of two-jet continuum events containing a both an anticharm tag (Dbar) as well as an antiproton (e+e- -> Dbar pbar X), with the antiproton in the hemisphere opposite the Dbar. Under the hypothesis that such selection criteria tag e+e- -> Dbar pbar (/\c) X events, the /\c->pkpi branching fraction can be determined by measuring the pkpi yield in the same hemisphere as the antiprotons in our Dbar pbar X sample. Combining our results from three independent types of anticharm tags, we obtain B(/\c->pKpi)=(5.0+/-0.5+/-1.2)%
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