Nucleon distribution amplitudes from lattice QCD.
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.
Göckeler
Meinulf
M
Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany.
Horsley
Roger
R
Kaltenbrunner
Thomas
T
Nakamura
Yoshifumi
Y
Pleiter
Dirk
D
Rakow
Paul E L
PE
Schäfer
Andreas
A
Schierholz
Gerrit
G
Stüben
Hinnerk
H
Warkentin
Nikolaus
N
Zanotti
James M
JM