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Nucleon distribution amplitudes from lattice QCD. 2008
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, and
Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany.
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 MS[over ] 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.
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