Lenz, Alexander and Wittmann, Markus and Stein, Eckart (2004) 'Improved light-cone sum rules for the electromagnetic form factors of the nucleon.', Physics letters B., 581 (3-4). pp. 199-206.
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.
|Additional Information:||QCD, Nucleon, Power corrections, Distribution amplitudes, Electromagnetic form factors|
|Full text:||(VoR) Version of Record|
Available under License - Creative Commons Attribution.
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|Publisher Web site:||http://dx.doi.org/10.1016/j.physletb.2003.12.009|
|Publisher statement:||Published under an Open access under CC BY license|
|Date accepted:||07 December 2015|
|Date deposited:||24 February 2016|
|Date of first online publication:||February 2004|
|Date first made open access:||No date available|
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