Decay constants of the charmed vector mesons D⁎ and Ds⁎ from QCD sum rules

@inproceedings{Lucha2014DecayCO,
  title={Decay constants of the charmed vector mesons D⁎ and Ds⁎ from QCD sum rules},
  author={Wolfgang Lucha and Dmitri Melikhov and S. Simula},
  year={2014}
}
Abstract We present a sum-rule calculation of the decay constants of the charmed vector mesons D ⁎ and D s ⁎ from the two-point correlator of vector currents. First, we show that the perturbative expansion in terms of the pole mass exhibits no sign of convergence whereas the reorganization of this expansion in terms of the MS ¯ mass leads to a distinct hierarchy. Second, making use of the operator product expansion in terms of the MS ¯ mass, we determine the decay constants of the D ⁎ and D s… CONTINUE READING

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