0000000000040384

AUTHOR

S. Guerriero

showing 2 related works from this author

Nonperturbative renormalization in coordinate space

2003

We present an exploratory study of a gauge-invariant non-perturbative renormalization technique. The renormalization conditions are imposed on correlation functions of composite operators in coordinate space on the lattice. Numerical results for bilinears obtained with overlap and O(a)-improved Wilson fermions are presented. The measurement of the quark condensate is also discussed.

QuarkPhysicsNuclear and High Energy PhysicsHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)field theory gauge theory lattice renormalizationFOS: Physical sciencesFísicaParticle Physics - LatticeFermionAtomic and Molecular Physics and OpticsComposite operatorRenormalizationFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIHigh Energy Physics - LatticeLattice (order)Non-perturbativeCoordinate spaceMathematical physics
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Non-perturbative renormalization of lattice operators in coordinate space

2004

We present the first numerical implementation of a non-perturbative renormalization method for lattice operators, based on the study of correlation functions in coordinate space at short Euclidean distance. The method is applied to compute the renormalization constants of bilinear quark operators for the non-perturbative O(a)-improved Wilson action in the quenched approximation. The matching with perturbative schemes, such as MS-bar, is computed at the next-to-leading order in continuum perturbation theory. A feasibility study of this technique with Neuberger fermions is also presented.

PhysicsNuclear and High Energy PhysicsHigh Energy Physics::Latticefield theory gauge theory lattice renormalizationHigh Energy Physics - Lattice (hep-lat)FísicaFOS: Physical sciencesQuenched approximationFIS/02 - FISICA TEORICA MODELLI E METODI MATEMATICIRenormalizationEuclidean distanceHigh Energy Physics - LatticeOperator (computer programming)Quantum mechanicsFunctional renormalization groupPerturbation theory (quantum mechanics)Coordinate spaceNon-perturbativeMathematical physics
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