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Type: Conference paper
Title: Wave functions of the nucleon and its parity partner from lattice QCD
Author: Warkentin, N.
Braun, V.
Gockeler, M.
Kaltenbrunner, T.
Schafer, A.
Schierholz, G.
Nakamura, Y.
Pleiter, D.
Horsley, R.
Zanotti, J.
Rakow, P.
Stüben, H.
Citation: P o S - Proceedings of Science (LATTICE 2008), 2008; 154:1-154:7
Publisher: Scuola Internazionale Superiore di Studi Avanzati (S I S S A)
Publisher Place: Italy
Issue Date: 2008
ISSN: 1824-8039
Conference Name: International Symposium on Lattice Field Theory (26th : 2008 : Williamsburg, Virginia, U.S.A.)
Statement of
Nikolaus Warkentin, Vladimir M. Braun, Meinulf Göckeler, Thomas Kaltenbrunner, Andreas Schäfer, Gerrit Schierholz, Yoshifumi Nakamura, Dirk Pleiter, Roger Horsley, James M. Zanotti, Paul E. L. Rakow, Hinnerk Stüben, QCDSF Collaboration
Abstract: We compute moments of distribution amplitudes using gauge configurations with two flavors of clover fermions from QCDSF/DIK and operators which are optimized with respect to their behavior under the lattice symmetries. The knowledge of these quantities helps in understanding the internal structure of hadrons and in the analysis of (semi-)exclusive processes. We present results for the nucleon distribution amplitude which suggest that the asymmetries (the deviations from the asymptotic form) are smaller than indicated by sum rule calculations. Using the same approach we were also able to calculate the same quantities for the N?(1535), the parity partner of the nucleon. These results show a stronger deviation from the asymptotic form.
Rights: Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
RMID: 0020120345
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Appears in Collections:Chemistry and Physics publications

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