Profiles of the broken string in two-flavor QCD below and above the finite temperature transition

V. G. Bornyakov; M. N. Chernodub; H. Ichie; Y. Koma; Y. Mori; M. I. Polikarpov; G. Schierholz; H. Stüben; T. Suzuki

doi:10.1143/PTP.112.307

paper

Profiles of the broken string in two-flavor QCD below and above the finite temperature transition

arXiv:hep-lat/0401027 · doi:10.1143/PTP.112.307

Abstract

We study the Abelian flux tube profile of mesonic and the baryonic configurations of static quarks below and above the finite-temperature transition in $N_{f} = 2$ full QCD. To reduce effects of ultra-violet fluctuations we measure Abelian distributions of the action density, the color-electric field and the monopole current after fixing to the maximally Abelian gauge. Changing the distance $R$ between quarks for fixed $T / T_{c} < 1$ , one can see a clear signal of string breaking for large $R$ . The electric field becomes Coulomb-like and the circulating monopole current disappears. We study also the temperature dependence of the flux profile for fixed $R \approx 0.7$ fm. The disappearance of the squeezed flux is observed clearly above $T_{c}$ . Similar behaviors are observed both in the mesonic and the baryonic systems.

17 pages, 13 figures, Latex