31 July 2023 to 4 August 2023
America/Chicago timezone

Updates on Pion and Kaon Valence-Quark and Gluon Distributions from $N_f=2+1+1$ QCD

1 Aug 2023, 16:40
20m
One West (WH1W)

One West

WH1W

Speaker

Huey-Wen Lin (MSU)

Description

We present recent updates on the lattice calculations of the valence-quark GPDs of the pion, the pion and kaon gluon PDF, and their first gluon moment in the physical-continuum limit. All these calculations are done on ensembles with $N_f = 2 + 1 + 1$ highly improved staggered quarks (HISQ), generated by the MILC Collaboration. The valence-quark GPD of the pion is done at lattice spacing 0.09~fm with physical pion masses and boosted pion momentum around 1.7~GeV with four additional nonzero transfer momenta in the Breit frame, using LaMET method with next-to-next-to-leading order perturbative matching. We update MSULat's previous meson gluon PDF calculations using pseudo-PDFs with a third lattice spacing at 0.09~fm with 310-Mev pion mass. We also present the first pion and kaon gluon moments at the continuum-physical limit with 3 pion masses and 3 lattice spacings.

Topical area Structure of Hadrons and Nuclei

Primary authors

Huey-Wen Lin (MSU) Matthew Zeilbeck (Michigan State University ) William Good

Presentation materials