Short-distance tachyonic gluon mass and 1/Q2 corrections

@inproceedings{Chetyrkin1999ShortdistanceTG,
  title={Short-distance tachyonic gluon mass and 1/Q2 corrections},
  author={Konstantin G. Chetyrkin and St{\'e}phan Narison and Valentin Ivanovich Zakharov},
  year={1999}
}
We consider the assumption that a tachyonic gluon mass imitates short-distance nonperturbative physics of QCD. The phenomenological implications include modifications of the QCD sum rules for correlators of currents with various quantum numbers. The new 1/Q 2 terms allow to resolve in a natural way old puzzles in the pion and scalar-gluonium channels. They lead to a slight reduction of the values of the running light quark masses from the (pseudo)scalar sum rules and of αs(Mτ) from τ decay data… CONTINUE READING

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