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- W2937452352 abstract "Recently, there have been rapid developments in lattice-QCD calculations of proton structure, especially in the parton distribution functions (PDFs). We overcame a longstanding obstacle and for the first time in lattice-QCD are able to directly calculate the Bjorken- x dependence of the quark, helicity and transversity distributions. The PDFs are obtained using the large-momentum effective field theory (LaMET) framework where the full Bjorken- x dependence of finite-momentum PDFs, called “quasi-PDFs”, can be calculated on the lattice. The quasi-PDF nucleon matrix elements are renormalized non-perturbatively in RI/MOM-scheme. Following a nonperturbative renormalization of the parton quasi-distribution in a regularization-independent momentum-subtraction scheme, we establish its matching to the $ overline {{rm{MS}}} $ PDF and calculate the non-singlet matching coefficient at next-to-leading order in perturbation theory. In this proceeding, I will show the progress that has been made in recent years, highlighting the latest state-of-the art PDF calculations at the physical pion mass. Future impacts on the large- x global PDF fits are also discussed." @default.
- W2937452352 created "2019-04-25" @default.
- W2937452352 creator A5006121718 @default.
- W2937452352 date "2019-01-01" @default.
- W2937452352 modified "2023-10-16" @default.
- W2937452352 title "Parton Distribution Functions and Lattice QCD" @default.
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- W2937452352 doi "https://doi.org/10.1051/epjconf/201920601003" @default.
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