# The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

## Calculation of Distribution Amplitudes in Quantum Chromodynamics using Large-Momentum Effective Theory up to power accuracy

Aug 11, 2022, 10:00 AM
20m
CP1-HSZ/Ground-0.010 - HS2 (CP1-HSZ)

450

### Speaker

Jack Holligan (University of Maryland)

### Description

Distribution amplitudes (DAs) describe the momentum of a meson’s constituent partons and are of great importance in quantum chromodynamics (QCD) experiments and phenomenology. The advent of large-momentum effective theory (LaMET) in 2013 made the determination of DAs amenable to lattice calculations. Parton physics is described in the limit of infinite momentum and corrections to LaMET calculations are quadratic in $\Lambda_{\rm QCD}/P$. However, contamination from renormalons results in corrections linear in $\Lambda_{\rm QCD}/P$. A new and more robust method for removing the effects of renormalons in linear divergence is presented, applied to the calculation of meson distribution amplitudes in QCD and preliminary results are shown.

### Primary author

Jack Holligan (University of Maryland)

### Co-authors

Mr Rui Zhang (University of Maryland) Xiangdong Ji (University of Maryland) Yushan Su (University of Maryland)