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Impact of lattice $s(x)-\bar{s}(x)$ data in the CTEQ-TEA global analysis

We study the impact of the lattice data on the determination of the strangeness asymmetry distribution $s_-(x) \equiv s(x) - {\bar s}(x)$ in the general CTEQ-TEA global analysis of parton distribution functions (PDFs) of the proton. Firstly, we find that allowing a non-vanishing $s_-(x)$, at the initial $Q_0=1.3$ GeV scale, in a global PDF analysis leads to the quality of the CT18As fit similar to CT18A. Secondly, including the lattice data in the CT18As\_Lat fit greatly reduces the $s_-$-PDF error band size in the large $x$ region. To further reduce its error would require more precise lattice data, extended to smaller $x$ values.

preprint2022arXivOpen access
Tie-Jiun HouHuey-Wen LinMengshi YanC. -P. Yuan
hep-phhep-lat
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Tie-Jiun HouHuey-Wen LinMengshi YanC. -P. Yuan

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