Gluon parton distribution of the pion from lattice QCD

Fan, Zhouyou; Lin, Huey-Wen

doi:10.1016/j.physletb.2021.136778

Gluon parton distribution of the pion from lattice QCD

Journal Article · Wed Nov 10 00:00:00 EST 2021 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2021.136778· OSTI ID:1981729

^[1]; Lin, Huey-Wen ^[1]

Michigan State Univ., East Lansing, MI (United States)

We present the first determination of the x-dependent pion gluon distribution from lattice QCD using the pseudo-PDF approach. We use lattice ensembles with 2+1+1 flavors of highly improved staggered quarks (HISQ), generated by MILC Collaboration, at two lattice spacings a ≈ 0.12 and 0.15 fm and three pion masses M_π ≈ 220, 310 and 690 MeV. We use clover fermions for the valence action and momentum smearing to achieve pion boost momentum up to 2.29 GeV. We find that the dependence of the pion gluon parton distribution on lattice spacing and pion mass is mild. We compare our results from the lightest pion mass ensemble with the determination by JAM and xFitter global fits.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: National Science Foundation (NSF); USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1981729

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: C Vol. 823; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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