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arxiv: 2407.18724 · v1 · pith:YPGJ4D77new · submitted 2024-07-26 · ✦ hep-ph · hep-ex· hep-lat

Next-to-Leading-Order QCD Predictions for the Nucleon Form Factors

classification ✦ hep-ph hep-exhep-lat
keywords factorsformcontributionsnucleondiracfirstnext-to-leading-orderpredictions
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We accomplish for the first time the next-to-leading-order QCD computations of the leading-twist contributions to the Dirac form factors of both the proton and the neutron by applying the hard-collinear factorization theorem rigorously. The resulting predictions for these baryon form factors indicate that the one-loop perturbative corrections to the hard-gluon-exchange contributions are numerically substantial for a wide range of momentum transfers accessible in the current and forthcoming collider experiments. Including further the (formally) power-suppressed soft contributions due to the celebrated Feynman mechanism, we then perform the state-of-the-art analysis of the Dirac electromagnetic nucleon form factors from first field-theoretical principles, thus allowing for the most robust determinations of the nucleon distribution amplitudes from the direct comparison with the experimental measurements.

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