A local formulation of lattice QCD without unphysical fermion zero modes

Abstract

The problem of unphysical zero modes in lattice QCD with Wilson fermions can be solved in a clean way by including a mass term proportional to iψγ5τ ψ in the standard lattice theory with Nf = 2 mass degenerate Wilson quarks. We argue that up to cutoff effects, this lattice theory is equivalent to standard lattice QCD, for suitable choices of the mass parameters and with a natural re-interpretation of observables. On-shell O(a) improvement can be implemented in a straightforward way.

Cite this paper

@inproceedings{Frezzotti1999ALF, title={A local formulation of lattice QCD without unphysical fermion zero modes}, author={R. Frezzotti and Pietro Antonio Grassi and Stefan Sint and Peter Weisz}, year={1999} }