We propose a method to evaluate numerically and in some cases analytically the two-loop contributions to physical quantities without computing Feynman graphs. Such contributions are negligible for the SU(2) Wilson action, which shows a precocious scaling; on the contrary they are important for other actions (including Manton and heat kernel ones) and account for the observed violations of universality. © 1982.

Precocious scaling in lattice gauge theories

Ravanini F.;
1982

Abstract

We propose a method to evaluate numerically and in some cases analytically the two-loop contributions to physical quantities without computing Feynman graphs. Such contributions are negligible for the SU(2) Wilson action, which shows a precocious scaling; on the contrary they are important for other actions (including Manton and heat kernel ones) and account for the observed violations of universality. © 1982.
1982
Gliozzi F.; Ravanini F.; Sciuto S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/898989
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