Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Updated measurements of absolute $D^+$ and $D^0$ hadronic branching
  fractions and $\sigma(e^+e^-\to D\overline{D})$ at $E_\mathrm{cm} = 3774$ MeV   Utilizing the full CLEO-c data sample of 818 pb$^{-1}$ of $e^+e^-$ data taken
at the $\psi(3770)$ resonance, we update our measurements of absolute hadronic
branching fractions of charged and neutral $D$ mesons. We previously
reportedresults from subsets of these data. Using a double tag technique we
obtain branching fractions for three $D^0$ and six $D^+$ modes, including the
reference branching fractions $\mathcal{B} (D^0\to K^-\pi^+)=(3.934 \pm 0.021
\pm 0.061)\%$ and $\mathcal{B} (D^+ \to K^- \pi^+\pi^+)=(9.224 \pm 0.059 \pm
0.157)\%$. The uncertainties are statistical and systematic, respectively. In
these measurements we include the effects of final-state radiation by allowing
for additional unobserved photons in the final state, and the systematic errors
include our estimates of the uncertainties of these effects. Furthermore, using
an independent measurement of the luminosity, we obtain the cross sections
$\sigma(e^+e^-\to D^0\overline{D}{}^0)=(3.607\pm 0.017 \pm 0.056) \
\mathrm{nb}$ and $\sigma(e^+e^-\to D^+D^-)=(2.882\pm 0.018 \pm 0.042) \
\mathrm{nb}$ at a center of mass energy, $E_\mathrm{cm} = 3774 \pm 1$ MeV.

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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: nucl-ex