String Breaking in Four Dimensional Lattice QCD

Details String Breaking in Four Dimensional Lattice QCD String Breaking in Four Dimensional Lattice QCD

2000-11-21

arxiv.org/abs/hep-lat/0011076v2

Phys.Rev.D63:111501,2001

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages, 5 figures, Latex (deleted extraneous eps figure file)

Scientific paper

10.1103/PhysRevD.63.111501

Virtual quark pair screening leads to breaking of the string between fundamental representation quarks in QCD. For unquenched four dimensional lattice QCD, this (so far elusive) phenomenon is studied using the recently developed truncated determinant algorithm (TDA). The dynamical configurations were generated on an Athlon 650 MHz PC. Quark eigenmodes up to 420 MeV are included exactly in these TDA studies performed at low quark mass on large coarse (but O($a^2$) improved) lattices. A study of Wilson line correlators in Coulomb gauge extracted from an ensemble of 1000 two-flavor dynamical configurations reveals evidence for flattening of the string tension at distances R $\geq$ approximately 1 fm.

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