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Johan Rathsman. Photo.

Johan Rathsman

Senior lecturer

Johan Rathsman. Photo.

The static PQCD potential with modified boundary conditions

Author

  • Paul Hoyer
  • Johan Rathsman

Summary, in English

We calculate the potential between two static quarks in QCD using modified boundary conditions for the perturbative expansion. Through a change of the Feynman prescription we effectively add a "sea" of gluons to the asymptotic states with energies below a given scale A. We find that the standard result for the static potential gets corrections of order A 2/Q 2 both at small and large momentum transfers Q 2. After resummation of the infrared sensitive corrections we find that the running coupling α s(Q 2) freezes in the infrared and that the exchanged gluon gets an effective tachyonic mass. We verify that identical results are obtained in the Coulomb and Feynman gauges.

Publishing year

2001-12-01

Language

English

Publication/Series

Journal of High Energy Physics

Volume

5

Issue

5

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Asymptotic freedom
  • Confinement
  • Non-perturbative effects
  • QCD

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479