Nucleon distribution amplitudes and their application to nucleon form factors and the N→Δ transition at intermediate values of Q2

Lenz, A.; Göckeler, M.; Kaltenbrunner, T.; Warkentin, N.

Abstract

We compare a recent lattice determination of the nucleon distribution amplitudes with other approaches and models. We study the nucleon distribution amplitudes up to twist 6 in next-to-leading conformal spin and we also investigate conformal d-wave contributions to the leading-twist distribution amplitude. With the help of light-cone sum rules one can relate the distribution amplitudes to the form factors of the nucleon or the N→Δ transition at intermediate values of the momentum transfer. We compare our results with experimental data in the range 1  GeV2≤Q2≤10  GeV2. Keeping in mind that we are working only in leading order QCD and next-to-leading order QCD corrections might be sizeable, we already obtain a surprisingly good agreement for the nucleon form factors GnM, GpM, GpA, and GpT and for the N→Δ transition form factor ratios REM and RSM.

Citation

Lenz, A., Göckeler, M., Kaltenbrunner, T., & Warkentin, N. (2009). Nucleon distribution amplitudes and their application to nucleon form factors and the N→Δ transition at intermediate values of Q2. Physical Review D, 79(9), https://doi.org/10.1103/physrevd.79.093007

• Journal Article Type: Article
• Publication Date: May 15, 2009
• Deposit Date: Nov 19, 2012
• Journal: Physical Review D
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 79
• Issue: 9
• DOI: https://doi.org/10.1103/physrevd.79.093007
• Public URL: https://durham-repository.worktribe.com/output/1470686