Mixed action with Borici-Creutz fermions on staggered sea
S. Basak, D. Chakrabarti, J. Goswami
TL;DR
This paper investigates mixed action lattice QCD using Borici-Creutz fermions on a staggered sea, fixing counter terms nonperturbatively to restore symmetries and analyzing unitarity violations.
Contribution
It introduces a nonperturbative method to fix counter terms in Borici-Creutz fermions within mixed action lattice QCD, assessing unitarity violations.
Findings
Restoration of parity and time symmetries in the action.
Observation of negative scalar correlator indicating partial quenching.
Unitarity violation size comparable to other mixed action approaches.
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 and is found to be comparable with other mixed action studies.
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