Lattice2010

Session

Parallel 12: Chiral symmetry

14 Jun 2010, 16:40

Villasimius, Sardinia

25. Renormalization of minimally doubled fermions

Stefano Capitani (University of Mainz)

14/06/2010, 16:40

Chiral symmetry

Minimally doubled fermions have been proposed as a strictly local discretization of the QCD quark action, which also preserves chiral symmetry at finite cut-off. We study the renormalization and mixing properties of two particular realizations of minimally doubled fermions in lattice perturbation theory at one loop. We also construct conserved axial-vector currents, which have a simple...

82. Pairs of massless quarks on the lattice from staggered fermions

David Adams (Nanyang Technological University)

14/06/2010, 17:00

Chiral symmetry

A version of overlap fermions built from staggered rather than Wilson fermions is presented. It has the remarkable property of reducing the 4 flavors (tastes) of the staggered fermion to two flavors, which can be taken as the up and down quarks in Lattice QCD. The exact flavored chiral symmetry of the staggered fermion gets converted into an unflavored Ginsparg-Wilson chiral symmetry of the...

299. Numerical properties of overlap staggered fermions

Philippe de Forcrand (ETH Zurich & CERN)

14/06/2010, 17:20

Chiral symmetry

David Adams has recently proposed a 2-flavor overlap Dirac operator based on the Neuberger construction, but using a staggered kernel. We illustrate how this operator satisfies the index theorem, investigate some of its promising properties, and compare with the usual Neuberger operator.

255. Staggered chiral perturbation theory in the two-flavor case

Xining Du (Washington University in St.Louis)

14/06/2010, 17:40

Chiral symmetry

In the light pseudoscalar sector, I study rooted staggered chiral perturbation theory in the two-flavor case. The pion mass and decay constant are calculated through NLO for a partially-quenched theory. In the limit where the strange quark mass is large compared to the light quark masses and the taste splittings, I show that the SU(2) staggered chiral theory emerges from the SU(3)...