Short-distance tachyonic gluon mass and 1/Q^2 corrections

Details Short-distance tachyonic gluon mass and 1/Q^2 corrections Short-distance tachyonic gluon mass and 1/Q^2 corrections

1998-11-09

arxiv.org/abs/hep-ph/9811275v2

Nucl.Phys. B550 (1999) 353-374

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 1 figure, Latex, epsfig.sty is required. New version: we have added a discussion about the effects of the tachyonic

Scientific paper

10.1016/S0550-3213(99)00167-4

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 alpha_s(M_\tau) from tau decay data. Further tests can be provided by precision measurements of the correlators on the lattice and by the e^+e^- --> hadrons data.

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