XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

First Glance at Nucleon Polarized Gluon and Strange Parton Distribution Functions on the Lattice

24 Mar 2020, 12:30

15m

Brooklyn, NY

Contributed Talk Structure Functions and Parton Densities Structure function and parton densities

Speaker

Prof. Huey-Wen Lin (Michigan State University)

Description

We present the first attempt to access the x-dependence of the gluon polarized and strange parton distribution functions (PDFs) from lattice calculations, using large-momentum effective theory (LaMET). LaMET methods have been applied to a wide variety of isovector nucleon distributions and valence pion distributions. However, the polarized gluon and strange-quark distributions have not yet been studied. This work carried out the first such lattice calculation with pion masses of 340 and 678 MeV with 3 lattice spacings. We compare the lattice results with the Fourier transform of selected global fits in coordinate space and discuss future prospects.