Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance

Abstract

We report new measurements of the cross sections for the production of D Dbar final states at the psi(3770) resonance. Our data sample consists of an integrated luminosity of 2.93/fb of e+e- annihilation data produced by the BEPCII collider and collected and analyzed with the BESIII detector. We exclusively reconstruct three D0 and six D+ hadronic decay modes and use the ratio of the yield of fully reconstructed D Dbar events ("double tags") to the yield of all reconstructed D or Dbar mesons ("single tags") to determine the number of D0 D0bar and D+D- events, benefiting from the cancellation of many systematic uncertainties. Combining these yields with an independent determination of the integrated luminosity of the data sample, we find the cross sections to be σ(e+e- --> D0 D0bar)=(3.615 +- 0.010 +- 0.038) nb and σ(e+e- --> D+D-)=(2.830 +- 0.011 +- 0.026) nb, where the uncertainties are statistical and systematic, respectively.

arXiv commentRevisions, version accepted by CPC

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• Improved determination of the $D\to K^{-}{\pi }^{+}{\pi }^{+}{\pi }^{-}$ coherence factor and associated hadronic parameters from a combination of $e^{+}{e}^{-}\to \psi (3770)\to c\bar{c}$ and $pp\to c\bar{c}X$ data
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Cited by in corpus (23)

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• Search for the decay $D^0\to {\pi }^0\nu \bar{\nu }$
• Measurement of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{D}^{+}{D}^{-}$ cross sections at center-of-mass energies from 4.190 to 4.946 GeV
• Improved measurement of the strong-phase difference ${\delta }_D^{K\pi }$ in quantum-correlated $D\bar{D}$ decays
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• Observation of the Doubly Cabibbo-Suppressed Decay $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$ and Evidence for $D^{+}\to K^{+}\omega$
• Measurement of the $CP$-even fraction of $D^0\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$
• Search for baryon and lepton number violating decays $D^{+}\to \bar{\Lambda }({\bar{\Sigma }}^0)e^{+}$ and $D^{+}\to \Lambda ({\Sigma }^0)e^{+}$
• Determination of the absolute branching fractions of $D^0\to K^{-}{e}^{+}{\nu }_e$ and $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$
• Measurement of the $CP$-even fraction of $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$
• Test of lepton universality and measurement of the form factors of $D^0\to K^{\ast }(892{)}^{-}{\mu }^{+}{\nu }_{\mu }$
• First measurement of polarizations in the decay $D^0\to \omega \varphi$
• Measurement of branching fractions for $D$ meson decaying into $\varphi$ meson and a pseudoscalar meson
• Determination of the $CP$-even fraction of $D^0\to K_S^0{\pi }^{+}{\pi }^{-}{\pi }^0$
• Novel correlated $D^0\overline{D}{}^0$ systems for $c/b$ physics and tests of $T/CPT$
• Observation of $D^{0(+)}\to K_S^0{\pi }^{0(+)}{\eta }^{\prime }$ and improved measurement of $D^0\to K^{-}{\pi }^{+}{\eta }^{\prime }$
• Charged-to-neutral meson yield ratio at $\psi (3770)$ and ${\rm Y}(4S)$ revisited
• Measurement of the strong-phase difference between $D^0$ and $\overline{D^0}\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ in bins of phase space
• Search for CP violation in $e^{+}{e}^{-}\to \psi (3770)\to D^0{\bar{D}}^0$ via $D->K_S^0{\pi }^0$