Simplified Test of Universality in Lattice QCD
- 21 April 2004
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 92 (16) , 162002
- https://doi.org/10.1103/physrevlett.92.162002
Abstract
A simplified test of universality in lattice QCD is performed by analytically evaluating the continuous Euclidean time limits of various lattice fermion determinants, both with and without a Wilson term to lift the fermion doubling on the Euclidean time axis, and comparing them with each other and with the zeta-regularized fermion determinant in the continuous time-lattice space setting. The determinant relations expected from universality considerations are found to be violated by a certain gauge field-dependent factor; i.e., we uncover a "universality anomaly." The physical significance, or lack thereof, of this factor is a delicate question that remains to be settled.Keywords
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