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

Autor:	Huang, Yong-Kang, Shi, Bo-Xuan, Wang, Yu-Ming, Zhao, Xue-Chen
Rok vydání:	2024
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice
Druh dokumentu:	Working Paper
Popis:	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. Comment: 7+4 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2407.18724 Zobrazit plný text záznamu View this record from Arxiv