QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes

Ding, Heng-Tong; Gao, Xiang; Hanlon, Andrew D.; Mukherjee, Swagato; Petreczky, Peter; Shi, Qi; Syritsyn, Sergey; Zhang, Rui; Zhao, Yong

doi:10.1103/PhysRevLett.133.181902

Title: QCD Predictions for Meson Electromagnetic Form Factors at High Momenta: Testing Factorization in Exclusive Processes

Journal Article · 28 October 2024 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.133.181902 · OSTI ID:2475428

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Central China Normal University, Wuhan (China)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for BioMolecular Structure (CBMS)
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Central China Normal University, Wuhan (China); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook University, NY (United States)

We report the first lattice QCD computation of pion and kaon electromagnetic form factors, 𝐹_𝑀⁡(𝑄²), at large momentum transfer up to 10 and 28 GeV², respectively. Utilizing physical masses and two fine lattices, we achieve good agreement with JLab experimental results at 𝑄² ≲ 4 GeV². For 𝑄² ≳ 4 GeV², 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-𝑄² 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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Temple University-Of The Commonwealth System Of Higher Education, Philadelphia, PA (United States)

Sponsoring Organization:: NSFC; National Energy Research Scientific Computing Center (NERSC); National Key R&D Program of China; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-05CH11231; AC02-06CH11357; AC05-00OR22725; SC0012704; SC0023646

OSTI ID:: 2475428

Report Number(s):: BNL-226316-2024--JAAM

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 133; ISSN 1079-7114; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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