arXiv:0804.1877·v2·High Energy Physics — Lattice
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🇬🇧
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.
Comments: 5 pages, 3 figures, 2 tables. RevTeX style. Normalization for \lambda_i corrected. Discussion of the results extended. To be published in PRL