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Observation of psi (4415) ---> D anti-D*(2)(2460) decay using initial-state radiation

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•
Aug, 2007
6 pages
Published in:
  • Phys.Rev.Lett. 100 (2008) 062001
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Abstract: (arXiv)
We report the first observation of the ψ(4415)\psi(4415) resonance in the reaction \e^+e^-\to D^0 D^-\pi^+ and a measurement of its cross section in the center-of-mass energy range 4.0GeV4.0\mathrm{GeV} to 5.0GeV5.0\mathrm{GeV} with initial state radiation. From a study of resonant structure in ψ(4415)\psi(4415) decay we conclude that the ψ(4415)→D0D−π+\psi(4415)\to D^0 D^-\pi^+ decay is dominated by ψ(4415)→DDˉ2∗(2460)\psi(4415)\to D \bar D{}^{*}_2(2460). We obtain B(ψ(4415)→D0D−πnon−resonant+)/B(ψ(4415)→DDˉ2∗(2460)→D0D−π+)<0.22\mathcal{B}(\psi(4415)\to D^0 D^-\pi^+_{\mathrm {non-resonant}})/\mathcal{B}(\psi(4415)\to D \bar D{}^{*}_2(2460)\to D^0 D^-\pi^+)<0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb−1\mathrm{fb}^{-1}.
  • 13.87.Fh
  • 13.66.Bc
  • 14.40.Gx
  • electron positron: colliding beams
  • electron positron: annihilation
  • psi(4415): electroproduction
  • radiation: initial-state interaction
  • psi(4415): hadronic decay
  • mass spectrum: (D- D0 pi+)
  • D*2(2460)