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Nuclear force from lattice QCD.

N Ishii1, S Aoki, T Hatsuda

  • 1Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Ibaraki, Japan.

Physical Review Letters
|August 7, 2007
PubMed
Summary
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Lattice QCD simulations reveal the nucleon-nucleon potential. The study shows a repulsive core at short distances and an attractive well at longer distances, matching nuclear force observations.

Area of Science:

  • Nuclear Physics
  • Quantum Chromodynamics (QCD)

Background:

  • The nucleon-nucleon (NN) potential is fundamental to understanding nuclear structure and interactions.
  • Previous studies relied on phenomenological models, lacking a direct derivation from fundamental theory.

Purpose of the Study:

  • To investigate the NN potential using lattice QCD simulations.
  • To determine the short- and long-range characteristics of the NN interaction from first principles.

Main Methods:

  • Utilized lattice QCD simulations with the plaquette gauge and Wilson quark actions.
  • Defined the NN potential from the equal-time Bethe-Salpeter amplitude.
  • Analyzed the (1)S(0) and (3)S(1) scattering channels.

Main Results:

Related Experiment Videos

  • Identified a strong repulsive core in the central NN potential at distances < 0.5 fm.
  • Observed an attractive well at medium and long distances.
  • The derived potential exhibits features consistent with phenomenological nuclear forces.

    • Conclusions:

    • Lattice QCD simulations provide a first-principles approach to understanding the NN potential.
    • The simulated NN potential's repulsive core and attractive well align with experimental observations of the nuclear force.