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Valence parton distribution function of pion from fine lattice

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arxiv 1905.06349 v2 pith:MIP7YAUH submitted 2019-05-15 hep-lat hep-exhep-phnucl-exnucl-th

Valence parton distribution function of pion from fine lattice

classification hep-lat hep-exhep-phnucl-exnucl-th
keywords latticevalencepionri-momdistributionelementfineloop
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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