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Nuclear parton distribution functions (nuclear PDFs) are non-perturbativeobjects that encode the partonic behaviour of bound nucleons. To avoidpotential higher-twist contributions, the data probing the high-$x$ end ofnuclear PDFs are sometimes left out from the global extractions despite theirpotential to constrain the fit parameters. In the present work we focus on thekinematic corner covered by the new high-$x$ data measured by the CLAS/JLabcollaboration. By using the Hessian re-weighting technique, we are able toquantitatively test the compatibility of these data with globally analyzednuclear PDFs and explore the expected impact on the valence-quark distributionsat high $x$. We find that the data are in a good agreement with the EPPS16 andnCTEQ15 nuclear PDFs whereas they disagree with TuJu19. The implications onflavour separation, higher-twist contributions and models of EMC effect arediscussed.

Can we fit our nuclear PDFs with the high-$x$ CLAS data?