We introduce a mixed-action approach based on CLS ensembles, where a valence Nf=2+1+1 Twisted Mass QCD action is combined with the Nf=2+1 non-perturbatively O(a)-improved Wilson sea sector. We show that for maximally twisted valence quarks, the automatic O(a)-improvement of this set-up holds up to lattice artifacts coming from sea quark mass effects. Furthermore, we introduce a three-dimensional Gradient Flow smearing in order to tame the signal to noise ratio problem.
@article{arxiv.1812.01474,
title = {Heavy-quark physics with a tmQCD valence action},
author = {Andrea Bussone and Sergio Chaves and Gregorio Herdoíza and Carlos Pena and David Preti and José Ángel Romero and Javier Ugarrio},
journal= {arXiv preprint arXiv:1812.01474},
year = {2018}
}
Comments
6 pages, 3 figures, talk presented at the 36th Annual International Symposium on Lattice Field Theory, 22-28 July 2018, East Lansing, Michigan, USA