Measurement of absolute hadronic branching fractions of $D$ mesons and $e^{+} e^{-} \to D \bar{D}$ cross sections at the $ψ (3770)$

28 December 2007

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 76 (11) , 112001
https://doi.org/10.1103/physrevd.76.112001

Abstract

Using

281 {pb}^{- 1}

e^{+} e^{-}

collisions recorded at the

ψ (3770)

resonance with the CLEO-c detector at CESR (Cornell Electron Storage Ring), we determine absolute hadronic branching fractions of charged and neutral

D

mesons using a double tag technique. Among measurements for three

D^{0}

and six

D^{+}

modes, we obtain reference branching fractions

B (D^{0} \to K^{-} π^{+}) = (3.891 \pm 0.035 \pm 0.059 \pm 0.035) %

and

B (D^{+} \to K^{-} π^{+} π^{+}) = (9.14 \pm 0.10 \pm 0.16 \pm 0.07) %

, where the first uncertainty is statistical, the second is all systematic errors other than final-state radiation (FSR), and the third is the systematic uncertainty due to FSR. We include FSR in these branching fractions by allowing for additional unobserved photons in the final state. Using an independent determination of the integrated luminosity, we also extract the cross sections

σ (e^{+} e^{-} \to D^{0} {\bar{D}}^{0}) = (3.66 \pm 0.03 \pm 0.06) nb

and

σ (e^{+} e^{-} \to D^{+} D^{-}) = (2.91 \pm 0.03 \pm 0.05) nb

at a center-of-mass energy,

E_{cm} = 3774 \pm 1 MeV

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This publication has 27 references indexed in Scilit:

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Measurement of absolute hadronic branching fractions of D mesons and e+e−→DD¯ cross sections at the ψ(3770)

Abstract

Keywords

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Measurement of absolute hadronic branching fractions of $D$ mesons and $e^{+} e^{-} \to D \bar{D}$ cross sections at the $ψ (3770)$