Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-12-20
JHEP 0101:013,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
Compare to the previosly archived edition, I have extended the work to include various classes of vortex flux distribution whi
Scientific paper
10.1088/1126-6708/2001/01/013
The potentials between static sources in various representaions in SU(3) are calculated based on the fat-center-vortices model of Faber, Greensite and Olejnik. At intermediate distances, most distributions of the flux within vortices lead to potentials that are qualitatively in agreement with ``Casimir scaling,'' which says that the string tension is proportional to the quadratic operator of the representation. However, at the quantitative level, violations of Casimir scaling are generally much larger than those seen in numerical simulations, indicating that additional physical input to the fat-center-vortices model is required. At large distances, screening occurs for zero-triality representations; for the representations with non-zero triality the string tension equals that of the fundamental representation. Some rather ``unphysical,'' flux distributions can lead to violations of Casimir scaling at intermediate distances and violations of the expected ordering of representations at large distances.
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