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

Session

Presentations

13 Aug 2024, 13:15

University of Maryland, College Park

31. Lanczos for spectroscopy

Michael Wagman

13/08/2024, 13:15

I will present a new method for determining the energy spectrum of lattice QCD using the Lanczos algorithm. The method provides faster ground-state convergence than standard energy estimators and rigorous two-sided error bounds, while avoiding the exponential signal-to-noise degradation present using standard methods.

32. Lanczos for matrix elements

Daniel Hackett

13/08/2024, 13:45

We present a new method for extracting hadronic matrix elements from simultaneous analysis of two- and three-point correlation functions, based on the Lanczos algorithm. In applications to both synthetic and lattice data, we demonstrate its advantages in both signal-to-noise and treatment of excited states over previous analysis approaches. We discuss the potential improvements for quasi-PDF...

25. Off-lightcone Wilson-line operators in gradient flow

Xiangpeng Wang (Technische Universität München)

13/08/2024, 14:10

Off-lightcone Wilson-line operators are constructed using local operators connected by time-like or space-like Wilson lines, which ensure gauge invariance. Off-lightcone Wilson-line operators have broad applications in various contexts. For instance, space-like Wilson-line operators play a crucial role in determining quasi-distribution functions (quasi-PDFs), while time-like Wilson-line...

10. Quarks and Glue inside Hadrons in the Instanton Vacuum

Wei-yang Liu (Stony Brook University)

13/08/2024, 14:40

We discuss a general framework for the evaluation of the parton distribution, distribution amplitudes as well as the form factors in light hadrons in the QCD vacuum. At medium resolution of the order of the inverse mean instanton size, the glue is mostly localized in single or pair of pseudoparticles, and globally constrained by the fluctuations of their topological charges. These...