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Title: Topological susceptibility in staggered fermion chiral perturbation theory

Abstract

The topological susceptibility of the vacuum in quantum chromodynamics has been simulated numerically using the Asqtad improved staggered fermion formalism. At nonzero lattice spacing, the residual fermion doublers (fermion tastes) in the staggered fermion formalism give contributions to the susceptibility that deviate from conventional continuum chiral perturbation theory. In this brief report, we estimate the taste-breaking artifact and compare it with results of recent simulations, finding that it accounts for roughly half of the scaling violation.

Authors:
; ;  [1]
  1. Physics Department, University of Utah, Salt Lake City, Utah 84112 (United States)
Publication Date:
OSTI Identifier:
20705403
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 70; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.70.077502; (c) 2004 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; CHIRAL SYMMETRY; CHIRALITY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; FERMIONS; LATTICE FIELD THEORY; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; SYMMETRY BREAKING; TOPOLOGY

Citation Formats

Billeter, Brian, DeTar, Carleton, and Osborn, James. Topological susceptibility in staggered fermion chiral perturbation theory. United States: N. p., 2004. Web. doi:10.1103/PhysRevD.70.077502.
Billeter, Brian, DeTar, Carleton, & Osborn, James. Topological susceptibility in staggered fermion chiral perturbation theory. United States. https://doi.org/10.1103/PhysRevD.70.077502
Billeter, Brian, DeTar, Carleton, and Osborn, James. 2004. "Topological susceptibility in staggered fermion chiral perturbation theory". United States. https://doi.org/10.1103/PhysRevD.70.077502.
@article{osti_20705403,
title = {Topological susceptibility in staggered fermion chiral perturbation theory},
author = {Billeter, Brian and DeTar, Carleton and Osborn, James},
abstractNote = {The topological susceptibility of the vacuum in quantum chromodynamics has been simulated numerically using the Asqtad improved staggered fermion formalism. At nonzero lattice spacing, the residual fermion doublers (fermion tastes) in the staggered fermion formalism give contributions to the susceptibility that deviate from conventional continuum chiral perturbation theory. In this brief report, we estimate the taste-breaking artifact and compare it with results of recent simulations, finding that it accounts for roughly half of the scaling violation.},
doi = {10.1103/PhysRevD.70.077502},
url = {https://www.osti.gov/biblio/20705403}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 70,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 2004},
month = {Fri Oct 01 00:00:00 EDT 2004}
}