Nucleon distribution amplitudes from lattice QCD

Meinulf Göckeler; Roger Horsley; Thomas Kaltenbrunner; Yoshifumi Nakamura; Dirk Pleiter; Paul E. L. Rakow; Andreas Schäfer; Gerrit Schierholz; Hinnerk Stüben; Nikolaus Warkentin; James M. Zanotti

doi:10.1103/PhysRevLett.101.112002

Nucleon distribution amplitudes from lattice QCD

High Energy Physics - Lattice 2008-11-26 v2 High Energy Physics - Phenomenology

Authors: Meinulf Göckeler , Roger Horsley , Thomas Kaltenbrunner , Yoshifumi Nakamura , Dirk Pleiter , Paul E. L. Rakow , Andreas Schäfer , Gerrit Schierholz , Hinnerk Stüben , Nikolaus Warkentin , James M. Zanotti

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Abstract

We calculate low moments of the leading-twist and next-to-leading twist nucleon distribution amplitudes on the lattice using two flavors of clover fermions. The results are presented in the MSbar scheme at a scale of 2 GeV and can be immediately applied in phenomenological studies. We find that the deviation of the leading-twist nucleon distribution amplitude from its asymptotic form is less pronounced than sometimes claimed in the literature.

Keywords

lattice qcd parton distribution functions

Cite

@article{arxiv.0804.1877,
  title  = {Nucleon distribution amplitudes from lattice QCD},
  author = {Meinulf Göckeler and Roger Horsley and Thomas Kaltenbrunner and Yoshifumi Nakamura and Dirk Pleiter and Paul E. L. Rakow and Andreas Schäfer and Gerrit Schierholz and Hinnerk Stüben and Nikolaus Warkentin and James M. Zanotti},
  journal= {arXiv preprint arXiv:0804.1877},
  year   = {2008}
}

Comments

5 pages, 3 figures, 2 tables. RevTeX style. Normalization for \lambda_i corrected. Discussion of the results extended. To be published in PRL

Nucleon distribution amplitudes from lattice QCD

Abstract

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