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Title: Gluon Parton Distribution of the Pion from Lattice QCD
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 Mπ≈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.  more » « less
Award ID(s):
1653405
NSF-PAR ID:
10249338
Author(s) / Creator(s):
Date Published:
Journal Name:
Physics letters
ISSN:
0370-2693
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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