Axial symmetries in lattice QCD with Kaplan fermions

Axial Symmetries in Lattice QCD with Kaplan Fermions

A lattice definition of QCD based on chiral defect fermions is discussed in detail. This formulation involves (infinitely) many heavy regulator fields, realized through the introduction of an unphysical fifth dimension. It is proved that non-singlet axial symmetries become exact in the limit of an infinite fifth dimension, and before the continuum limit is taken. ∗ Present address: School of Ph...

On the Realization of Continuous Flavor Symmetries in Large N Lattice Qcd with Susskind Fermions*

Finite Temperature Lattice QCD with Clover Fermions ∗

Department of Physics, Brookhaven National Lab, Upton, NY 11973, USA Physics Department, University of Colorado, Boulder, CO 80309, USA Physics Department, University of Utah, Salt Lake City, UT 84112, USA Department of Physics, Indiana University, Bloomington, IN 47405, USA SCRI, Florida State University, Tallahassee, FL 32306-4052, USA Department of Physics, University of Arizona, Tucson, AZ ...

Algorithms for Lattice QCD with Dynamical Fermions

We consider recent progress in algorithms for generating gauge field configurations that include the dynamical effects of light fermions. We survey what has been achieved in recent state-of-the-art computations, and examine the trade-offs between performance and control of systematic errors. We briefly review the use of polynomial and rational approximations in Hybrid Monte Carlo algorithms, an...

Nucleon axial charge from quenched lattice QCD with domain wall fermions and DBW2 gauge action

The domain wall fermion (DWF) method, with its almost perfectly preserved chiral symmetry on the lattice, makes the calculation of the nucleon axial charge particularly easy. By maintaining chiral symmetry and using the Ward-Takahashi (WT) identity, one has ZA = ZV and the bare lattice calculation yields the physical value without explicit renormalization. The DBW2 improved gauge action provide...