2024 Meeting on Lattice Parton Physics from Large Momentum Effective Theory (LaMET2024)

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

12 Aug 2024, 13:15

30m

University of Maryland, College Park

Presentations

Speaker

Peter Petreczky

Description

We report the first lattice QCD computation of pion and kaon electromagnetic form factors, $F_M(Q^2)$,
at large momentum transfer up to 10 and 28 GeV2, respectively. The calculations are performed using HISQ
action on fine lattices with physical quark massesi and Breit frame [1].
We test the QCD collinear factorization framework utilizing our high- $Q^2$ form factors at next-to-next-to-leading
order in perturbation theory, and lattice QCD results on the pion and kaon distribution amplituded calculated
within the LaMET approach using fine HISQ lattices with physical quark masses [2].
Within estimated uncertainties we find that QCD collinear factorization framework works [1].

References

[1] H.-T. Ding et al, arXiv:2404.04412 [hep-lat]
[2] I. Cloet et al, arXiv:2407.00206 [hep-lat]

Presentation materials

lamet24.pdf