QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes
Apr 5, 2024
15 pages
Published in:
- Phys.Rev.Lett. 133 (2024) 18, 181902
- Published: Oct 29, 2024
e-Print:
- 2404.04412 [hep-lat]
DOI:
- 10.1103/PhysRevLett.133.181902 (publication)
View in:
Citations per year
Abstract: (APS)
We report the first lattice QCD computation of pion and kaon electromagnetic form factors, , at large momentum transfer up to 10 and , respectively. Utilizing physical masses and two fine lattices, we achieve good agreement with JLab experimental results at . For , our results provide ab initio QCD benchmarks for the forthcoming experiments at JLab 12 GeV and future electron-ion colliders. We also test the QCD collinear factorization framework utilizing our high- form factors at next-to-next-to-leading order in perturbation theory, which relates the form factors to the leading Fock-state meson distribution amplitudes. Comparisons with independent lattice QCD calculations using the same framework demonstrate, within estimated uncertainties, the universality of these nonperturbative quantities.Note:
- Phys. Rev. Lett. 133, 181902; 15 pages, 9 figures
- pi: form factor
- K: form factor
- form factor: electromagnetic
- electron nucleon: colliding beams
- higher-order: 2
- factorization: collinear
- meson: distribution amplitude
- quantum chromodynamics
- lattice field theory
- Jefferson Lab
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