\begin{document}$\sqrt{s} = 13$\end{document} TeV proton–proton collision data with an integrated luminosity of 140 fb\begin{document}$^{-1}$\end{document} collected by the ATLAS experiment. Two taggers with high performances in rejecting jets from gluon over jets from quarks are studied: one tagger is based on requirements on the number of inner-detector tracks associated with the jet, and the other combines several jet substructure observables using a boosted decision tree. A method is established to determine the quark/gluon fraction in data, by using quark/gluon-enriched subsamples defined by the jet pseudorapidity. Differences in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points."> Performance and calibration of quark/gluon-jet taggers using 140 fb<sup>−1</sup> of <i>pp</i> collisions at <inline-formula><tex-math id="M3">\begin{document}${{\sqrt{\boldsymbol s}\bf = 13}}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/f264bd2e-9265-44e8-89c5-1fb66969a600/CPC-2023-0307_M3.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="//www.macurncorp.com/hepnp/article/app/id/f264bd2e-9265-44e8-89c5-1fb66969a600/CPC-2023-0307_M3.png"/></alternatives></inline-formula> TeV with the ATLAS detector -
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