Leading power accuracy in lattice calculations of parton distributions
نویسندگان
چکیده
In lattice-QCD calculations of parton distribution functions (PDFs) via large-momentum effective theory, the leading power (twist-three) correction appears as O(ΛQCD/Pz) due to linear-divergent self-energy Wilson line in quasi-PDF operators. For lattice data with hadron momentum Pz a few GeV, this is dominant matching, large 30% or more. We show how eliminate uncertainty through choosing mass renormalization parameter consistently resummation scheme infrared-renormalon series perturbative matching coefficients. An example on pion PDF at Pz=1.9 GeV shows an improvement accuracy by factor more than 3∼5 expansion region x=0.2∼0.5.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2023
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2023.138081