English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper we express the velocity-dependent, spin-dependent heavy quark potential Vq q̄ in QCD in terms of a Wilson loopW(G) determined by pure Yang-Mills theory. We use an effective dual theory of longdistance Yang-Mills theory to calculate W(G) for large loops, i.e., for loops of size R.RFT . @RFT is the flux tube radius, fixed by the value of the Higgs ~monopole! mass of the dual theory, which is a concrete realization of the Mandelstam-’t Hooft dual superconductor mechanism of confinement. # We replaceW(G) by Weff(G), given by a functional integral over the dual variables, which for R.RFT can be evaluated by a semiclassical expansion, since the dual theory is weakly coupled at these distances. The classical approximation gives the leading contribution toWeff(G) and yields a velocity-dependent heavy quark potential that for large R b comes linear inR, and that for small R approaches lowest-order perturbative QCD. This latter fact means that these results should remain applicable down to distances where radiative corrections giving rise to a running coupling constant become important. The spin dependence of the potential at long range as well as at short range reflects the vector coupling of quarks in QCD combined with the dual treatment of long-distance Yang-Mills theory. The methods developed here should be applicable to any realization of the dual superconductor mechanism. They give an expression determining Weff(G) independent of the classical approximation, but semiclassical corrections due to fluctuations of the flux tube are not worked out in this paper. Taking these into account should lead to an effective string theory free from the conformal anomaly. @S0556-2821 ~96!03916-1#

Confinement: Understanding the relation between the Wilson loop and dual theories of long distance Yang-Mills theory.