Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1994-09-13
Phys.Rev.D50:6939-6948,1994
Physics
High Energy Physics
High Energy Physics - Lattice
11 pages (REVTEX 3.0). TRI-PP-94-22, SFU HEP-114-94. 14 Figures (hardcopies available by request from trottier@sfu.ca). Accept
Scientific paper
10.1103/PhysRevD.50.6939
The effect of cooling on a number of observables is calculated in SU(2) lattice gauge theory. The static quark-antiquark potential and spin-dependent interactions are studied, and the topological charge is monitored. The chiral symmetry breaking order parameter $\langle \overline{\chi}\chi \rangle$ and meson correlators are calculated using staggered fermions. Interactions on the distance scale of a few lattice spacings are found to be essentially eliminated by cooling, including the spin-dependent potentials. $\langle \overline{\chi}\chi \rangle$ and meson correlators up to time separations of several lattice spacings relax very quickly to their free-field values. At larger times, there is evidence of a difference between the pseudoscalar and vector channels. A fit to the pseudoscalar correlation function yields ``mass'' values about $2/3$ (in lattice units) of the uncooled masses. These results raise the question of how to reconcile the large-time behavior of the hadron correlators with the fact that the spin-dependent potentials and $\langle \overline{\chi}\chi \rangle$ essentially disappear (in lattice units) after only a small amount of cooling.
Trottier Howard D.
Woloshyn Richard M.
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