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

Session

Presentations

14 Aug 2024, 08:30

University of Maryland, College Park

15. Impact of gauge fixing precision on the continuum limit of non-local quark-bilinear lattice operators

Prof. Yi-Bo Yang (ITP/CAS)

14/08/2024, 08:30

We analyze the gauge fixing precision dependence of some non-local quark-blinear lattice operators interesting in computing parton physics for several measurements, using 5 lattice spacings ranging from 0.032 fm to 0.121 fm. Our results show that gauge dependent non-local measurements are significantly more sensitive to the precision of gauge fixing than anticipated. The impact of imprecise...

16. Systematic Uncertainties from Gribov Copies in Lattice Calculation of Quasi-distributions in the Coulomb gauge

Jinchen He (University of Maryland, College Park)

14/08/2024, 09:00

Recently, it is proposed to compute Parton distribution in fixed Coulomb gauge without Wilson line, which could greatly improve the efficiency of lattice calculations. However, there are some concerns about the systematic uncertainties from Gribov copies, which correspond to the ambiguity in the nonperturbative gauge fixing, is not controlled. This work gives an assessment on the systematic...

8. Light-cone distribution amplitudes of a light baryon in large-momentum effective theory

Dr Jun Zeng (Shanghai Jiao Tong University)

14/08/2024, 09:20

Momentum distributions of quarks/gluons inside a light baryon in a hard exclusive process are encoded in the light-cone distribution amplitudes (LCDAs). In this work, we point out that the leading twist LCDAs of a light baryon can be obtained through a simulation of a quasi-distribution amplitude calculable on lattice QCD within the framework of the large-momentum effective theory. We...

9. Lightcone and quasi distribution amplitudes for light octet and decuplet baryons

chao han

14/08/2024, 09:40

We present a comprehensive investigation of leading-twist lightcone distribution amplitudes (LCDAs) and quasi distribution amplitudes (quasi-DAs) for light octet and decuplet baryons within large momentum effective theory. In LaMET, LCDAs can be factorized in terms of a hard kernel and quasi-DAs that are defined as spatial correlators and calculable on Lattice QCD.
To renormalize...

7. The Baryon LCDA from Lattice QCD

Jun Hua

14/08/2024, 10:00

The baryon light-cone distribution amplitudes(LCDAs) are critical inputs for hard exclusive reactions involving large momentum transfer between the initial and final state hadron. We present a lattice calcuation for the entire x dependent baryon LCDA under large momentum effective theory. The numerically simulation is based on emsembles with 2+1 flavor stout smeared clover fermions and...