Gluon Quasi-Parton-Distribution Functions from Lattice QCD
| Autor: | Huey-Wen Lin, Adam Anthony, Yi-Bo Yang, Keh-Fei Liu, Zhouyou Fan |
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| Rok vydání: | 2018 |
| Předmět: |
Quark
Physics Quantum chromodynamics Particle physics 010308 nuclear & particles physics High Energy Physics::Lattice High Energy Physics::Phenomenology Lattice field theory Nuclear Theory General Physics and Astronomy Lattice QCD 01 natural sciences Computer Science::Digital Libraries Gluon Pion Distribution function 0103 physical sciences High Energy Physics::Experiment 010306 general physics Nucleon Nuclear Experiment |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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