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Title: First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $$L_s=8$$

Abstract

We present results for the static interquark potential, light meson and baryon masses, and light pseudoscalar meson decay constants obtained from simulations of domain wall QCD with one dynamical flavour approximating the $$s$$ quark, and two degenerate dynamical flavours with input bare masses ranging from $$m_s$$ to $$m_s/4$$ approximating the $$u$$ and $$d$$ quarks. We compare these quantities obtained using the Iwasaki and DBW2 improved gauge actions, and actions with larger rectangle coefficients, on $$16^3\times32$$ lattices. We seek parameter values at which both the chiral symmetry breaking residual mass due to the finite lattice extent in the fifth dimension and the Monte Carlo time history for topological charge are acceptable for this set of quark masses at lattice spacings above 0.1 fm. We find that the Iwasaki gauge action is best, demonstrating the feasibility of using QCDOC to generate ensembles which are good representations of the QCD path integral on lattices of up to 3 fm in spatial extent with lattice spacings in the range 0.09-0.13 fm. Despite large residual masses and a limited number of sea quark mass values with which to perform chiral extrapolations, our results for light hadronic physics scale and agree with experimental measurements within ourmore » statistical uncertainties.« less

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
919519
Report Number(s):
JLAB-IT-07-06; DOE/OR/23177-0209; hep-lat/0612005
Journal ID: ISSN 0556-2821; PRVDAQ; TRN: US0806426
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Phys.Rev.D
Additional Journal Information:
Journal Volume: 75; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARYONS; CHIRAL SYMMETRY; DECAY; DIMENSIONS; MESONS; PATH INTEGRALS; PHYSICS; PSEUDOSCALAR MESONS; QUANTUM CHROMODYNAMICS; QUARKS; SEAS; TOPOLOGY

Citation Formats

Antonio, D J, Blum, T, Bowler, K C, Boyle, P A, Christ, N H, Cohen, S D, Clark, M A, Dawson, C, Hart, A, Hashimoto, K, Izubuchi, T, Joó, B, Jung, C, Kennedy, A D, Kenway, R D, Li, S, Lin, H W, Lin, M F, Mawhinney, R D, Maynard, C M, Noaki, J, Ohta, S, Sasaki, S, Soni, A, Tweedie, R J, and Yamaguchi, A. First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $L_s=8$. United States: N. p., 2007. Web. doi:10.1103/PhysRevD.75.114501.
Antonio, D J, Blum, T, Bowler, K C, Boyle, P A, Christ, N H, Cohen, S D, Clark, M A, Dawson, C, Hart, A, Hashimoto, K, Izubuchi, T, Joó, B, Jung, C, Kennedy, A D, Kenway, R D, Li, S, Lin, H W, Lin, M F, Mawhinney, R D, Maynard, C M, Noaki, J, Ohta, S, Sasaki, S, Soni, A, Tweedie, R J, & Yamaguchi, A. First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $L_s=8$. United States. https://doi.org/10.1103/PhysRevD.75.114501
Antonio, D J, Blum, T, Bowler, K C, Boyle, P A, Christ, N H, Cohen, S D, Clark, M A, Dawson, C, Hart, A, Hashimoto, K, Izubuchi, T, Joó, B, Jung, C, Kennedy, A D, Kenway, R D, Li, S, Lin, H W, Lin, M F, Mawhinney, R D, Maynard, C M, Noaki, J, Ohta, S, Sasaki, S, Soni, A, Tweedie, R J, and Yamaguchi, A. Fri . "First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $L_s=8$". United States. https://doi.org/10.1103/PhysRevD.75.114501. https://www.osti.gov/servlets/purl/919519.
@article{osti_919519,
title = {First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $L_s=8$},
author = {Antonio, D J and Blum, T and Bowler, K C and Boyle, P A and Christ, N H and Cohen, S D and Clark, M A and Dawson, C and Hart, A and Hashimoto, K and Izubuchi, T and Joó, B and Jung, C and Kennedy, A D and Kenway, R D and Li, S and Lin, H W and Lin, M F and Mawhinney, R D and Maynard, C M and Noaki, J and Ohta, S and Sasaki, S and Soni, A and Tweedie, R J and Yamaguchi, A},
abstractNote = {We present results for the static interquark potential, light meson and baryon masses, and light pseudoscalar meson decay constants obtained from simulations of domain wall QCD with one dynamical flavour approximating the $s$ quark, and two degenerate dynamical flavours with input bare masses ranging from $m_s$ to $m_s/4$ approximating the $u$ and $d$ quarks. We compare these quantities obtained using the Iwasaki and DBW2 improved gauge actions, and actions with larger rectangle coefficients, on $16^3\times32$ lattices. We seek parameter values at which both the chiral symmetry breaking residual mass due to the finite lattice extent in the fifth dimension and the Monte Carlo time history for topological charge are acceptable for this set of quark masses at lattice spacings above 0.1 fm. We find that the Iwasaki gauge action is best, demonstrating the feasibility of using QCDOC to generate ensembles which are good representations of the QCD path integral on lattices of up to 3 fm in spatial extent with lattice spacings in the range 0.09-0.13 fm. Despite large residual masses and a limited number of sea quark mass values with which to perform chiral extrapolations, our results for light hadronic physics scale and agree with experimental measurements within our statistical uncertainties.},
doi = {10.1103/PhysRevD.75.114501},
url = {https://www.osti.gov/biblio/919519}, journal = {Phys.Rev.D},
issn = {0556-2821},
number = ,
volume = 75,
place = {United States},
year = {2007},
month = {6}
}