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Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

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Setting Limits on Supersymmetry Using Simplified Models
07:46

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Published on: November 15, 2013

Nucleon distribution amplitudes from lattice QCD.

Meinulf Göckeler1, Roger Horsley, Thomas Kaltenbrunner

  • 1Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany.

Physical Review Letters
|October 15, 2008
PubMed
Summary
This summary is machine-generated.

We calculated nucleon distribution amplitudes using lattice calculations. Our findings suggest their deviation from asymptotic forms is less significant than previously reported in scientific literature.

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Area of Science:

  • Particle Physics
  • Quantum Chromodynamics
  • Lattice Field Theory

Background:

  • Nucleon distribution amplitudes (NDAs) are crucial for understanding hadron structure.
  • Accurate NDAs are essential for theoretical predictions in high-energy physics.

Purpose of the Study:

  • To compute low moments of leading-twist and next-to-leading-twist NDAs.
  • To provide lattice-QCD results for phenomenological applications.

Main Methods:

  • Utilized lattice quantum chromodynamics (LQCD) simulations.
  • Employed two flavors of clover fermions for calculations.
  • Performed calculations in the MS-bar scheme at a 2 GeV scale.

Main Results:

  • Obtained low moments for both leading-twist and next-to-leading-twist NDAs.
  • Found that the leading-twist NDA's deviation from its asymptotic form is less pronounced than often claimed.
  • Provided results directly applicable to phenomenological studies.

Conclusions:

  • The study offers precise lattice-QCD calculations of NDAs.
  • Results refine understanding of nucleon structure and its deviation from asymptotic behavior.
  • The findings have immediate implications for high-energy physics phenomenology.