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The European Physical Journal C

, Volume 55, Issue 2, pp 249–258 | Cite as

Contribution of the DK continuum in the QCD sum rule for DsJ(2317)

  • Yuan-Ben Dai
  • Xin-Qiang Li
  • Shi-Lin Zhu
  • Ya-Bing Zuo
Regular Article - Theoretical Physics

Abstract

Using the soft-pion theorem and the assumption on the final-state interactions, we include the contribution of the DK continuum into the QCD sum rules for the DsJ(2317) meson. We find that this contribution can significantly lower the mass and the decay constant of the Ds(0+) state. For the value of the current quark mass mc(mc) = 1.286 GeV, we obtain the mass of Ds(0+) M=2.33 ± 0.02 GeV in the interval s0 = 7.5–8.0 GeV2, being in agreement with the experimental data, and the vector current decay constant of Ds(0+) f0=0.128 ± 0.013 GeV, much lower than those obtained in the previous literature.

Keywords

Spectral Function Operator Product Expansion BABAR Collaboration Minimal Subtraction Current Quark Mass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  • Yuan-Ben Dai
    • 1
  • Xin-Qiang Li
    • 1
  • Shi-Lin Zhu
    • 2
  • Ya-Bing Zuo
    • 3
  1. 1.Institute of Theoretical PhysicsChinese Academy of SciencesBeijingP.R. China
  2. 2.Department of PhysicsPeking UniversityBeijingP.R. China
  3. 3.Department of PhysicsGraduate School of Chinese Academy of SciencesBeijingP.R. China

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