Pion Valence Quark from quasi-PDF and pseudo-PDF

19 Jun 2019, 11:10
20m
Wuchang

Wuchang

Parallel Hadron structure Hadron structure

Speaker

Charles Shugert (Stony Brook University and Brookhaven National Lab)

Description

We present results of the pion valence-quark PDF using quasi-PDF and pseudo-PDF
methods. Using quasi-PDF's one relies on highly-boosted hadronic states in order
for LaMET to reliably match the quasi-PDF to the light-cone PDF. Alternativly
one can study pseudo PDF's, Fourier-transforms of the pseudo Ioffe-Time distribution
from $\nu$-space to x-space at fixed $z^2$ with $z$ being the quark-antiquark
separation. From here one can take the $z^2 \rightarrow 0$ limit to obtain the
light-cone PDF. Benifits and drawbacks of each method are explored. This
calculation was done using a HISQ sea ensemble with Wilson-Clover valence quarks,
on a $48^3\times64$ size lattice with a lattice spacing $a = 0.06$ fm, using a $300$
MEV pion mass.

Author

Charles Shugert (Stony Brook University and Brookhaven National Lab)

Co-authors

Nikhil Karthik (Brookhaven National Laboratory) Sergey Syritsyn (Stony Brook University) Taku Izubuchi (Brookhaven National Laboratory) Peter Petreczky (BNL) Luchang Jin Swagato Mukherjee (Brookhaven National Laboratory)

Presentation materials