The static PQCD potential with modified boundary conditions

Paul Hoyer; Johan Rathsman

The static PQCD potential with modified boundary conditions

University of Helsinki

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Journal	Journal of High Energy Physics
Volume	5
Issue number	5
Publication status	Published - 2001 Dec 1
Externally published	Yes

Subject classification (UKÄ)

Subatomic Physics

Free keywords

Asymptotic freedom
Confinement
Non-perturbative effects
QCD

Cite this

@article{7045b307c694448f8e2073157d2210e3,

title = "The static PQCD potential with modified boundary conditions",

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.",

keywords = "Asymptotic freedom, Confinement, Non-perturbative effects, QCD",

author = "Paul Hoyer and Johan Rathsman",

year = "2001",

month = dec,

day = "1",

language = "English",

volume = "5",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer",

number = "5",

}

TY - JOUR

T1 - The static PQCD potential with modified boundary conditions

AU - Hoyer, Paul

AU - Rathsman, Johan

PY - 2001/12/1

Y1 - 2001/12/1

N2 - 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.

AB - 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.

KW - Asymptotic freedom

KW - Confinement

KW - Non-perturbative effects

KW - QCD

UR - http://www.scopus.com/inward/record.url?scp=33744777221&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33744777221

SN - 1029-8479

VL - 5

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

ER -

The static PQCD potential with modified boundary conditions

Abstract

Subject classification (UKÄ)

Free keywords

Other files and links

Fingerprint

Cite this