Ginsparg-Wilson Relation and Lattice Chiral Symmetry in Fermionic Interacting Theories

Details Ginsparg-Wilson Relation and Lattice Chiral Symmetry in Fermionic Interacting Theories Ginsparg-Wilson Relation and Lattice Chiral Symmetry in Fermionic Interacting Theories

2002-03-18

arxiv.org/abs/hep-lat/0203019v1

Phys.Lett. B535 (2002) 363-370

Physics

High Energy Physics

High Energy Physics - Lattice

Scientific paper

10.1016/S0370-2693(02)01732-X

We derive Ginsparg-Wilson relation for a lattice chiral symmetry in theories with self-interacting fermions. Auxiliary scalar and pseudo-scalar fields are introduced on a coarse lattice to give an effective description of the fermionic interactions. We obtain particular solutions to the Ginsparg-Wilson relation and other Ward-Takahashi identities in a closed form. These non-perturbative solutions can be used to construct a chiral invariant action and an invariant path-integral measure on the coarse lattice. The resulting partition function exhibits the exact chiral symmetry in the fermionic system with the auxiliary fields.

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