String breaking by dynamical fermions in three-dimensional lattice QCD

Details String breaking by dynamical fermions in three-dimensional lattice QCD String breaking by dynamical fermions in three-dimensional lattice QCD

1998-12-22

arxiv.org/abs/hep-lat/9812021v2

Phys.Rev. D60 (1999) 034506

Physics

High Energy Physics

High Energy Physics - Lattice

Revised version to appear in Physical Review D, has additional discussion of the results, additional references, modified titl

Scientific paper

10.1103/PhysRevD.60.034506

The first observation is made of hadronic string breaking due to dynamical fermions in zero temperature lattice QCD. The simulations are done for SU(2) color in three dimensions, with two flavors of staggered fermions. The results have clear implications for the large scale simulations that are being done to search (so far, without success) for string breaking in four-dimensional QCD. In particular, string breaking is readily observed using only Wilson loops to excite a static quark-antiquark pair. Improved actions on coarse lattices are used, providing an extremely efficient means to access the quark separations and propagation times at which string breaking occurs.

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