Testing universality and automatic O(a) improvement in massless lattice QCD with Wilson quarks

Stefan Sint, Björn Leder
2011 Proceedings of The XXVIII International Symposium on Lattice Field Theory — PoS(Lattice 2010)   unpublished
The chirally rotated Schrödinger functional provides a test bed for universality and automatic O(a) improvement. We here report on extensive quenched simulations of lattice QCD with Wilson quarks in the massless limit. We demonstrate that, after proper tuning of a dimension 3 boundary counterterm, the expected chirally rotated boundary conditions are indeed obtained. This implies automatic O(a) improvement which we then verify in a few examples. Universality of properly renormalized correlation
more » ... functions is confirmed by comparing to the standard set-up of the Schrödinger functional. As a by-product of this study the non-singlet current renormalisation constants Z A and Z V are obtained from ratios of 2-point functions.
doi:10.22323/1.105.0265 fatcat:o3ddnnttjjdw7pwzcszoexkwga