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Quenched light hadron spectrum

Aoki1, Boyd, Burkhalter

  • 1Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.

Physical Review Letters
|October 4, 2000
PubMed
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We simulated the light hadron spectrum using lattice quantum chromodynamics (QCD). Our results show a small deviation from experimental values, within 11% in the continuum limit.

Area of Science:

  • High Energy Physics
  • Quantum Chromodynamics (QCD)
  • Hadron Spectroscopy

Background:

  • Understanding the properties of light hadrons is crucial for testing quantum chromodynamics (QCD).
  • Lattice QCD provides a non-perturbative approach to studying these properties.
  • Previous simulations have explored various aspects of hadron spectroscopy, but systematic comparisons with experimental data are ongoing.

Purpose of the Study:

  • To calculate the flavor nonsinglet light hadron spectrum using quenched lattice QCD.
  • To investigate hadron masses, decay constants, and light quark masses.
  • To compare simulation results with experimental data in the continuum limit.

Main Methods:

  • Employed quenched lattice quantum chromodynamics (QCD) with the Wilson quark action.

Related Experiment Videos

  • Performed large-scale simulations at four lattice spacings (a ≈ 0.1–0.05 fm) and five quark masses (m(pi)/m(rho) ≈ 0.75–0.4).
  • Extrapolated results to the continuum limit for comparison with experimental values.

    • Main Results:

    • Calculated hadron masses for the flavor nonsinglet light hadron spectrum.
    • Observed a systematic deviation from experimental data in the continuum limit, with a magnitude within 11%.
    • Reported results for hadron decay constants and light quark masses.

    Conclusions:

    • The quenched lattice QCD simulation with the Wilson quark action provides valuable insights into the light hadron spectrum.
    • The observed deviation from experiment suggests the need for further refinements, potentially including unquenched effects.
    • The study contributes to the ongoing effort to precisely determine hadron properties from first principles.