Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-07-27
Phys.Rev.D80:074504,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, ReVTeX. Paper shortened, results unchanged
Scientific paper
10.1103/PhysRevD.80.074504
The quark antiquark potential, and its associated zero point energy, can be extracted from lattice measurements of the Wilson loop. We discuss a unique prescription to renormalize the Wilson loop, for which the perturbative contribution to the zero point energy vanishes identically. A zero point energy can arise nonperturbatively, which we illustrate by considering effective string models. The nonperturbative contribution to the zero point energy vanishes in the Nambu model, but is nonzero when terms for extrinsic curvature are included. At one loop order, the nonperturbative contribution to the zero point energy is negative, regardless of the sign of the extrinsic curvature term.
Hidaka Yoshimasa
Pisarski Robert D.
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