Gluon Quasi-Parton-Distribution Functions from Lattice QCD
We present the first attempt to access the x dependence of the gluon unpolarized parton-distribution function (PDF), based on lattice simulations using the large-momentum effective theory approach. The lattice calculation is carried out with pion masses of 340 and 678 MeV on a (2 + 1)-flavor domain-wall fermion configuration with lattice spacing a = 0.111 fm, for the gluon quasi-PDF matrix element with the nucleon momentum up to 0.93 GeV. Taking the normalization from similar matrix elements in the rest frame of the nucleon and pion, our results for these matrix elements are consistent with the Fourier transform of the global fit CT14 and PDF4LHC15 NNLO of the gluon PDF, within statistical uncertainty and the systematic one up to power corrections, perturbative $$O$$(αs) matching and the mixing from the quark PDFs.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of Kentucky, Lexington, KY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0013065; AC02-05CH11231
- OSTI ID:
- 1485354
- Alternate ID(s):
- OSTI ID: 1544148; OSTI ID: 1599161
- Report Number(s):
- DOE-UKY-13065-1808.02077; PRLTAO; 242001
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 121 Journal Issue: 24; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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