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Title: First results from 2+1-flavor domain wall QCD: Mass spectrum, topology change, and chiral symmetry with L{sub 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{sub s} to m{sub 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{sup 3}x32 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 measurementsmore » within our statistical uncertainties.« less

Authors:
; ; ; ; ; ;  [1];  [2];  [3]; ; ; ; ;  [4];  [5];  [2];  [2];  [6];  [6];  [2] more »;  [6];  [7]; ;  [8] « less
  1. SUPA, School of Physics, The University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
  2. RIKEN-BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  3. (United States)
  4. Physics Department, Columbia University, New York, New York 10027 (United States)
  5. Center for Computational Science, 3 Cummington Street, Boston University, Massachusetts 02215 (United States)
  6. (Japan)
  7. Jefferson Laboratory, Newport News, Virginia 23606 (United States)
  8. Brookhaven National Laboratory, Upton, New York 11973 (United States) (and others)
Publication Date:
OSTI Identifier:
20929558
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.75.114501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; CHIRAL SYMMETRY; CHIRALITY; D QUARKS; EXTRAPOLATION; FLAVOR MODEL; MASS; MASS SPECTRA; MONTE CARLO METHOD; PARTICLE DECAY; PATH INTEGRALS; PSEUDOSCALAR MESONS; QUANTUM CHROMODYNAMICS; S QUARKS; SIMULATION; SYMMETRY BREAKING; TOPOLOGY

Citation Formats

Antonio, D. J., Bowler, K. C., Boyle, P. A., Hart, A., Kennedy, A. D., Kenway, R. D., Tweedie, R. J., Blum, T., Physics Department, University of Connecticut, Storrs Connecticut, 06269-3046, Christ, N. H., Cohen, S. D., Li, S., Lin, M. F., Mawhinney, R. D., Clark, M. A., Dawson, C., Hashimoto, K., Radiation Laboratory, RIKEN, Wako, Saitama 351-0198, Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Izubuchi, T., Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Joo, B., Jung, C., and Soni, A. First results from 2+1-flavor domain wall QCD: Mass spectrum, topology change, and chiral symmetry with L{sub s}=8. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.114501.
Antonio, D. J., Bowler, K. C., Boyle, P. A., Hart, A., Kennedy, A. D., Kenway, R. D., Tweedie, R. J., Blum, T., Physics Department, University of Connecticut, Storrs Connecticut, 06269-3046, Christ, N. H., Cohen, S. D., Li, S., Lin, M. F., Mawhinney, R. D., Clark, M. A., Dawson, C., Hashimoto, K., Radiation Laboratory, RIKEN, Wako, Saitama 351-0198, Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Izubuchi, T., Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Joo, B., Jung, C., & Soni, A. First results from 2+1-flavor domain wall QCD: Mass spectrum, topology change, and chiral symmetry with L{sub s}=8. United States. doi:10.1103/PHYSREVD.75.114501.
Antonio, D. J., Bowler, K. C., Boyle, P. A., Hart, A., Kennedy, A. D., Kenway, R. D., Tweedie, R. J., Blum, T., Physics Department, University of Connecticut, Storrs Connecticut, 06269-3046, Christ, N. H., Cohen, S. D., Li, S., Lin, M. F., Mawhinney, R. D., Clark, M. A., Dawson, C., Hashimoto, K., Radiation Laboratory, RIKEN, Wako, Saitama 351-0198, Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Izubuchi, T., Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192, Joo, B., Jung, C., and Soni, A. Fri . "First results from 2+1-flavor domain wall QCD: Mass spectrum, topology change, and chiral symmetry with L{sub s}=8". United States. doi:10.1103/PHYSREVD.75.114501.
@article{osti_20929558,
title = {First results from 2+1-flavor domain wall QCD: Mass spectrum, topology change, and chiral symmetry with L{sub s}=8},
author = {Antonio, D. J. and Bowler, K. C. and Boyle, P. A. and Hart, A. and Kennedy, A. D. and Kenway, R. D. and Tweedie, R. J. and Blum, T. and Physics Department, University of Connecticut, Storrs Connecticut, 06269-3046 and Christ, N. H. and Cohen, S. D. and Li, S. and Lin, M. F. and Mawhinney, R. D. and Clark, M. A. and Dawson, C. and Hashimoto, K. and Radiation Laboratory, RIKEN, Wako, Saitama 351-0198 and Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192 and Izubuchi, T. and Institute for Theoretical Physics, Kanazawa University, Kakuma, Kanazawa, 920-1192 and Joo, B. and Jung, C. and Soni, 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{sub s} to m{sub 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{sup 3}x32 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},
journal = {Physical Review. D, Particles Fields},
number = 11,
volume = 75,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}