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Apr 12 – 14, 2023
Minneapolis, Minnesota
US/Central timezone

Moments of nucleon generalized parton distributions from the leading-twist expansion of the quasi-GPD matrix element

Apr 12, 2023, 2:20 PM
20m
Orchestra B

Orchestra B

Speaker

Xiang Gao (Argonne National Lab)

Description

We present a lattice QCD determination of the nucleon generalized parton distributions (GPDs) from an analysis of the quasi-GPD matrix element within the leading-twist framework. We preform our study on a Nf=2+1+1 twisted mass fermions ensemble with a clover improvement. The faster and more effective lattice QCD calculations of GPDs using the asymmetric frames was applied so that we can achieve multiple momentum transfers $t$ with reduced computational cost. The quasi-GPD matrix elements are renormalized using ratio scheme and analyzed using the leading-twist Mellin operator product expansion (OPE) at the next-to-leading order. We find a robust result for the first non-vanishing Mellin moments <x> and <x^2> as a function of $t$.

Primary authors

Andreas Metz (Physics Department, Temple University, Philadelphia) Fernanda Steffens (University of Bonn) Jack Dodson (Temple University) Krzysztof Cichy Martha Constantinou (Temple University) Shohini Bhattacharya (BNL) Swagato Mukherjee (Brookhaven National Laboratory) Yong Zhao (ANL)

Presentation materials