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Title: Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate

Abstract

Growing evidence indicates that in the continuum limit the rooted staggered action is in the correct QCD universality class, the nonlocal terms arising from taste breaking can be viewed as lattice artifacts. In this paper we consider the 2-flavor Asqtad staggered action at lattice spacing a{approx_equal}0.13 fm and probe the properties of the staggered configurations by an overlap valence Dirac operator. By comparing the distribution of the overlap eigenmodes to continuum QCD predictions we investigate if/when the lattice artifacts are small as a function of the staggered quark mass. We define a matching overlap quark mass where the lattice corrections are minimal for the topological susceptibility and from the eigenmode distribution we predict the 2-flavor chiral condensate. Our results indicate that the staggered configurations are consistent with 2-flavor continuum QCD up to small lattice artifacts, and predict a consistent value for the infinite volume chiral condensate.

Authors:
;  [1]
  1. Department of Physics, University of Colorado, Boulder, Colorado 80309-390 (United States)
Publication Date:
OSTI Identifier:
20868119
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 74; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.74.114509; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRALITY; COMPUTERIZED SIMULATION; CORRECTIONS; DIRAC OPERATORS; DISTRIBUTION; FLAVOR MODEL; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS; TOPOLOGY; VALENCE

Citation Formats

Hasenfratz, Anna, and Hoffmann, Roland. Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate. United States: N. p., 2006. Web. doi:10.1103/PHYSREVD.74.114509.
Hasenfratz, Anna, & Hoffmann, Roland. Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate. United States. https://doi.org/10.1103/PHYSREVD.74.114509
Hasenfratz, Anna, and Hoffmann, Roland. 2006. "Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate". United States. https://doi.org/10.1103/PHYSREVD.74.114509.
@article{osti_20868119,
title = {Mixed action simulations on a staggered background: Interpretation and result for the 2-flavor QCD chiral condensate},
author = {Hasenfratz, Anna and Hoffmann, Roland},
abstractNote = {Growing evidence indicates that in the continuum limit the rooted staggered action is in the correct QCD universality class, the nonlocal terms arising from taste breaking can be viewed as lattice artifacts. In this paper we consider the 2-flavor Asqtad staggered action at lattice spacing a{approx_equal}0.13 fm and probe the properties of the staggered configurations by an overlap valence Dirac operator. By comparing the distribution of the overlap eigenmodes to continuum QCD predictions we investigate if/when the lattice artifacts are small as a function of the staggered quark mass. We define a matching overlap quark mass where the lattice corrections are minimal for the topological susceptibility and from the eigenmode distribution we predict the 2-flavor chiral condensate. Our results indicate that the staggered configurations are consistent with 2-flavor continuum QCD up to small lattice artifacts, and predict a consistent value for the infinite volume chiral condensate.},
doi = {10.1103/PHYSREVD.74.114509},
url = {https://www.osti.gov/biblio/20868119}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 74,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2006},
month = {Fri Dec 01 00:00:00 EST 2006}
}