Mixed action with Borici-Creutz fermions on staggered sea

Abstract

Mixed action lattice QCD with Borici-Creutz valence quarks on staggered sea is investigated. The counter terms in Borici-Creutz action are fixed nonperturbatively to restore the broken parity and time symmetries. On symmetry restoration, the usual signatures of partial quenching / unitarity violation like negative scalar correlator are observed. The size of unitarity violation due to different discretization of valence and sea quark is determined by measuring $\hat{I}{”}_{\mathrm{mix}}$ and is found to be comparable with other mixed action studies.

21 pages, 12 figures