Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-31
Nucl.Phys.B774:268-297,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
New version accepted for publication in Nucl. Phys. B. Text partly shortened, changes in the introduction, new results added o
Scientific paper
10.1016/j.nuclphysb.2007.04.003
Two improved superposition schemes for the construction of approximate multi-caloron-anticaloron configurations, using exact single (anti)caloron gauge fields as underlying building blocks, are introduced in this paper. The first improvement deals with possible monopole-Dirac string interactions between different calorons with non-trivial holonomy. The second one, based on the ADHM formalism, improves the (anti-)selfduality in the case of small caloron separations. It conforms with Shuryak's well-known ratio-ansatz when applied to instantons. Both superposition techniques provide a higher degree of (anti-)selfduality than the widely used sum-ansatz, which simply adds the (anti)caloron vector potentials in an appropriate gauge. Furthermore, the improved configurations (when discretized onto a lattice) are characterized by a higher stability when they are exposed to lattice cooling techniques.
Gerhold Philipp
Ilgenfritz Ernst-Michael
Muller-Preussker Michael
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