Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2000-03-15
Phys.Rev. D63 (2001) 034506
Physics
High Energy Physics
High Energy Physics - Lattice
Latex, 22 pages, 8 figures. A mistake in the computer program implementing the multihistogram method has been corrected and al
Scientific paper
10.1103/PhysRevD.63.034506
We present a high-statistic numerical study of the free energy of a monopole-antimonopole pair in pure SU(2) theory. We find that the monopole-antimonopole interaction potential exhibits a screened behavior, as one would expect in presence of a monopole condensate. Screening occurs both in the low-temperature, confining phase of the theory, and in the high-temperature deconfined phase, with no evidence of a discontinuity of the screening mass across the transition. The mass of the object responsible for the screening at low temperature is approximately twice the established value for the lightest glueball, indicating a prevalent coupling to glueball excitations. At high temperature, the screening mass increases. We contrast the behavior of the quantum system with that of the corresponding classical system, where the monopole-antimonopole potential is of the Coulomb type.
Hoelbling Ch.
Rebbi Claudio
Rubakov Valerii A.
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