Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Theorie
HK 21.3: Vortrag
Dienstag, 11. März 2008, 09:15–09:30, 2F
A non-perturbative approach to the nucleon distribution amplitude — Meinulf Göckeler1, Roger Horsley2, •Thomas Kaltenbrunner1, Yoshifumi Nakamura3, Dirk Pleiter3, Paul Rakow4, Andreas Schäfer1, Gerrit Schierholz3,5, Hinnerk Stüben6, Nikolaus Warkentin1, and James Zanotti2 — 1Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany — 2School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, UK — 3John von Neumann Institute NIC/DESY Zeuthen, 15738 Zeuthen, Germany — 4Theoretical Physics Division, Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, UK — 5Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany — 6Konrad-Zuse-Zentrum für Informationstechnik Berlin, 14195 Berlin, Germany
High luminosity accelerators have greatly increased the interest in semi-exclusive and exclusive reactions involving nucleons. The relevant theoretical information is contained in the nucleon wavefunction and can be parametrized by moments of the nucleon distribution amplitude, which in turn are linked to matrix elements of three-quark operators. These can be calculated from first principles in lattice QCD. We present renormalized non-perturbative results for the nucleon distribution amplitude based on its lowest moments and give an outlook on its phenomenological implications.