The static PQCD potential with modified boundary conditions
(2001) In Journal of High Energy Physics 5(5).- Abstract
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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7045b307-c694-448f-8e20-73157d2210e3
- author
- Hoyer, Paul and Rathsman, Johan LU
- publishing date
- 2001-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Asymptotic freedom, Confinement, Non-perturbative effects, QCD
- in
- Journal of High Energy Physics
- volume
- 5
- issue
- 5
- publisher
- Springer
- external identifiers
-
- scopus:33744777221
- ISSN
- 1029-8479
- language
- English
- LU publication?
- no
- id
- 7045b307-c694-448f-8e20-73157d2210e3
- date added to LUP
- 2019-05-14 13:47:48
- date last changed
- 2022-01-31 19:50:26
@article{7045b307-c694-448f-8e20-73157d2210e3, abstract = {{<p>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 <sup>2</sup>/Q <sup>2</sup> both at small and large momentum transfers Q <sup>2</sup>. After resummation of the infrared sensitive corrections we find that the running coupling α <sub>s</sub>(Q <sup>2</sup>) 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.</p>}}, author = {{Hoyer, Paul and Rathsman, Johan}}, issn = {{1029-8479}}, keywords = {{Asymptotic freedom; Confinement; Non-perturbative effects; QCD}}, language = {{eng}}, month = {{12}}, number = {{5}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{The static PQCD potential with modified boundary conditions}}, volume = {{5}}, year = {{2001}}, }