Improved light-cone sum rules for the electromagnetic form factors of the nucleon

Lenz, Alexander; Wittmann, Markus; Stein, Eckart

doi:10.1016/j.physletb.2003.12.009

Improved light-cone sum rules for the electromagnetic form factors of the nucleon

Lenz, Alexander; Wittmann, Markus; Stein, Eckart

Authors

Alexander Lenz

Markus Wittmann

Eckart Stein

Abstract

We calculate the electromagnetic form factors of the nucleon within the light-cone sum rule approach. In comparison to previous work [Phys. Rev. D 65 (2002) 074011] we suggest to use a pure isospin-1/2 interpolating field for the nucleon, since the Chernyak–Zhitnitsky current leads to numerically large, unphysical, isospin violating contributions. The leading-order sum rules are derived for the form factors and the results are confronted with the experimental data. Our approach tends to favor the nucleon distribution amplitudes that are not far from the asymptotic shape.

Citation

Lenz, A., Wittmann, M., & Stein, E. (2004). Improved light-cone sum rules for the electromagnetic form factors of the nucleon. Physics Letters B, 581(3-4), 199-206. https://doi.org/10.1016/j.physletb.2003.12.009

Journal Article Type	Article
Acceptance Date	Dec 7, 2015
Publication Date	Feb 1, 2004
Deposit Date	Dec 7, 2015
Publicly Available Date	Feb 24, 2016
Journal	Physics Letters B
Print ISSN	0370-2693
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	581
Issue	3-4
Pages	199-206
DOI	https://doi.org/10.1016/j.physletb.2003.12.009