Nucleon distribution amplitudes from lattice QCD
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Date
2008
Authors
Gockeler, M.
Horsley, R.
Kaltenbrunner, T.
Nakamura, Y.
Pleiter, D.
Rakow, P.
Schafer, A.
Schierholz, G.
Stüben, H.
Warkentin, N.
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Physical Review Letters, 2008; 101(11):112002:1-112002:4
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Meinulf Göckeler, Roger Horsley, Thomas Kaltenbrunner, Yoshifumi Nakamura, Dirk Pleiter, Paul E. L. Rakow, Andreas Schäfer, Gerrit Schierholz, Hinnerk Stüben, Nikolaus Warkentin, and James M. Zanotti (QCDSF Collaboration)
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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 MS̅ 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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© 2008 The American Physical Society