Nucleon and N^* (1535) Distribution Amplitudes

V. M. Braun , S. Collins , M. G\"ockeler , C. Hagen , R. Horsley , Y. Nakamura , D. Pleiter , P. E. L. Rakow

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A. Sch\"afer R. W. Schiel G. Schierholz H. St\"uben J. M. Zanotti

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classification ✦ hep-lat

keywords amplitudesdistributionnucleonapproximatelycalculationcollaborationconfigurationsconstants

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The QCDSF collaboration has investigated the distribution amplitudes and wavefunction normalization constants of the nucleon and its parity partner, the $N^* (1535)$. We report on recent progress in the calculation of these quantities on configurations with two dynamical flavors of $\mathcal{O}(a)$-improved Wilson fermions. New data at pion masses of approximately 270 MeV helps in significantly reducing errors in the extrapolation to the physical point.

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Nucleon and N^* (1535) Distribution Amplitudes

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