Measurement of the Inclusive Semi-electronic $D^0$ Branching Fraction

Abstract

Using the angular correlation between the ${\pi }^{+}$ emitted in a $D^{\ast +}\to D^0{\pi }^{+}$ decay and the $e^{+}$ emitted in the subsequent $D^0\to X{e}^{+}\nu$ decay, we have measured the branching fraction for the inclusive semi-electronic decay of the $D^0$ meson to be: {\cal B}(D^0 \rightarrow X e^+ ν) = [6.64 \pm 0.18 (stat.) \pm 0.29 (syst.)] \%. The result is based on 1.7 fb${}^{-1}$ of $e^{+}{e}^{-}$ collisions recorded by the CLEO II detector located at the Cornell Electron Storage Ring (CESR). Combining the analysis presented in this paper with previous CLEO results we find, \frac{{\cal B} (D^0 \rightarrow X e^+ ν)} {{\cal B} (D^0 \rightarrow K^- π^+)} = 1.684 \pm 0.056 (stat.) \pm 0.093(syst.) and \frac{{\cal B}(D\rightarrow K^-e^+ν)} {{\cal B}(D\rightarrow Xe^+ν)} = 0.581 \pm 0.023 (stat.) \pm 0.028(syst.). The difference between the inclusive rate and the sum of the measured exclusive branching fractions (measured at CLEO and other experiments) is $(3.3\pm 7.2)\%$ of the inclusive rate.

Latex file, 33pages, 4 figures Submitted to PRD

References in corpus (1)

• Leptonic and Semileptonic Decays of Charm and Bottom Hadrons

Cited by in corpus (5)

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• Absolute Branching Fraction Measurements for D^+ and D^0 Inclusive Semileptonic Decays
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• Heavy Baryon Production and Decay
• Higher Order QCD Corrections to $b\to c\overline{c}s$