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

Session

Presentations

12 Aug 2024, 08:30

University of Maryland, College Park

36. LaMET and Weinberg's EFT

Xiangdong Ji

12/08/2024, 08:30

22. Threshold resummation for computing large-x PDF under LaMET

Yushan Su (University of Maryland)

12/08/2024, 09:00

Parton distribution functions (PDFs) at large $x$ are difficult to be extracted from experimental data, but are extremely important in understanding hadron structures as well as searching for new physics beyond the Standard Model. We study the large $x$ PDFs under the framework of large momentum $P^z$ expansion of lattice quasi-PDFs. In the threshold limit, the matching kernel of quasi-PDF can...

21. Lattice QCD calculation of the pion distribution amplitude with domain wall fermions at physical pion mass

Rui Zhang

12/08/2024, 09:25

We present a direct lattice QCD calculation of the $x$-dependence of the pion distribution amplitude (DA), which is performed using the quasi-DA in large momentum effective theory on a domain-wall fermion ensemble at physical quark masses and spacing $a\approx 0.084$ fm. The bare quais-DA matrix elements are renormalized in the hybrid scheme and matched to $\overline{\mathrm{M}\mathrm{S}}$ with a...

33. Extracting Meson Distribution Amplitudes from Lattice QCD at Next-to-Next-to-Leading Order

Fei Yao

12/08/2024, 09:50

In this talk, I present the result of the next-to-next-to-leading order (NNLO) matching kernel for extracting light meson distribution amplitudes from lattice calculations of nonlocal Euclidean correlation functions. The renormalization is done in a state-of-the-art scheme. I also show some preliminary numerical test to demonstrate the impact of the NNLO matching.