Short-distance tachyonic gluon mass and 1/ Q2 corrections
Abstract
We consider the assumption that a tachyonic gluon mass imitates short-distance non-perturbative physics of QCD. The phenomenological implications include modifications of the QCD sum rules for correlators of currents with various quantum numbers. The new 1/ Q2 terms allow us 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. Analogously such terms only affect slightly the determinations of the running strange quark mass from e+e- and τ decay data. Further tests can be provided by precision measurements of the correlators on the lattice and by the e+e- → hadrons data.
- Publication:
-
Nuclear Physics B
- Pub Date:
- June 1999
- DOI:
- 10.1016/S0550-3213(99)00167-4
- arXiv:
- arXiv:hep-ph/9811275
- Bibcode:
- 1999NuPhB.550..353C
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment;
- High Energy Physics - Lattice
- E-Print:
- 18 pages, 1 figure, Latex, epsfig.sty is required. New version: we have added a discussion about the effects of the tachyonic gluon mass on the value of strange quark mass as extracted from tau decays. Two references are added. The complete paper, including figures, is also available via anonymous ftp at ftp://ttpux2.physik.uni-karlsruhe.de/ttp98/ttp98-39/ or via www at http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/preprints/