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arXiv · 1905.06349

Valence parton distribution function of pion from fine lattice

Taku Izubuchi·Luchang Jin·Christos Kallidonis·Nikhil Karthik·Swagato Mukherjee·Peter Petreczky·Charles Shugert·Sergey Syritsyn
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Abstract

We present a lattice QCD study of valence parton distribution inside the pion within the framework of Large Momentum Effective Theory. We use a mixed action approach with 1-HYP smeared valence Wilson clover quarks on 2+1 flavor HISQ sea with the valence quark mass tuned to 300 MeV pion mass. We use $48^3 \times 64$ lattice at a fine lattice spacing $a=0.06$ fm for this computation. We renormalize the quasi-PDF matrix element in the non-perturbative RI-MOM scheme. As a byproduct, we test the validity of 1-loop matching procedure by comparing the RI-MOM renormalized quasi-PDF matrix element with off-shell quark external states as computed in the continuum 1-loop perturbation theory with the lattice results at $a=0.04$ and 0.06 fm. By applying the RI-MOM to ${\bar{\rm MS}}$ one-loop matching, implemented through a fit to phenomenologically motivated PDFs, we obtain the valence PDF of pion.

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Taku Izubuchi, Luchang Jin, Christos Kallidonis, Nikhil Karthik, Swagato Mukherjee, Peter Petreczky, Charles Shugert, Sergey Syritsyn. 2019-09-05. Valence parton distribution function of pion from fine lattice. https://doi.org/10.1103/physrevd.100.034516

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