Nucleon form factors in QCD

• DOI: 10.1103/physrevd.73.094019
• Publication Date: 2006-05-19T18:54:17Z
• Authors: V. M. Braun; A. Lenz; M. Wittmann
• Keywords: Nuclear Theory (nucl-th); High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); Nuclear Theory; 0103 physical sciences; FOS: Physical sciences; Nuclear Experiment (nucl-ex); Nuclear Experiment; 01 natural sciences

We calculate the electromagnetic and the axial form factors of the nucleon within the framework of light cone sum rules (LCSR) to leading order in QCD and including higher twist corrections. In particular we motivate a certain choice for the interpolating nucleon field. We find that a simple model of the nucleon distribution amplitudes which deviate from their asymptotic shape, but much less compared to the QCD sum rule estimates, allows one to describe the data remarkably well.<br/>30 pages, several references included<br/>