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

Session

Presentations

14 Aug 2024, 11:00

University of Maryland, College Park

19. Factorization of quasi GPD and the ambiguity in the mixing channel

Zhuoyi Pang (The Chinese University of Hong Kong, ShenZhen)

14/08/2024, 11:00

In this talk, I'll report our earlier work on the factorization of quasi GPD based on collinear expansion. Using ward identity and BRST symmetry, we show how to get a gauge-invariant factorization form. We also discuss the inconsistency of the mixing channel results in literature: its origin and possible solutions.

27. One loop matching for singlet quasi-parton distributions in the hybrid ratio scheme

Jiunn-Wei Chen

14/08/2024, 11:20

We compute the matching kernel of singlet quasi-parton distributions in the hybrid ratio scheme. Momentum conservation of the quasi-distributions is observed. However, the renormalization condition is complicated by the quark and gluon mixing.

34. Towards Hybrid-Renormalized Gluon Parton Distribution Function from LaMET

William Good (Michigan State University)

14/08/2024, 11:50

We present the first attempt at using the hybrid-ratio renormalization scheme on gluon quasi-lightfront correlators from lattice quantum chromodynamics with $a \approx 0.12$ fm at pion masses $M_\pi \approx 310$ and $690$ MeV. We measured over 1.2 million two-point correlators and used momentum smearing and aggressive gauge link smearing for the gluon operator to obtain a reasonable level of...

37. Some mathematical aspects on reconstructing GPDs through universal moment parameterization

Mr Hao-Cheng Zhang

14/08/2024, 12:15

We present some mathematical results for reconstructing the generalized parton distributions (GPDs) through the universal moment parameterization (GUMP) program. We elucidate several subtle issues observed in previous literature, particularly the relationship between formal summation and the Mellin-Barnes integral. Furthermore, we derive an asymptotic condition on the conformal moments of GPDs...