Continuum Limit of Overlap Valence Quarks on a Twisted Mass Sea
High Energy Physics - Lattice
2011-05-26 v1
Abstract
We study a lattice QCD mixed action with overlap valence quarks on two flavours of Wilson maximally twisted mass sea quarks. Employing three different matching conditions to relate both actions to each other, we investigate the continuum limit by using three values of the lattice spacing ranging from 0.05 fm to 0.08 fm. A particular emphasis is put on the effect on physical observables of the topological zero modes appearing in the valence overlap operator. We estimate the region of parameter space where the contribution from these zero modes is sufficiently small such that their effects can be safely controlled and a restoration of unitarity of the mixed action in the continuum limit is reached.
Keywords
Cite
@article{arxiv.1012.4412,
title = {Continuum Limit of Overlap Valence Quarks on a Twisted Mass Sea},
author = {Krzysztof Cichy and Gregorio Herdoiza and Karl Jansen},
journal= {arXiv preprint arXiv:1012.4412},
year = {2011}
}
Comments
24 pages, 8 figures