6533b7d1fe1ef96bd125c341
RESEARCH PRODUCT
Can we fit nuclear PDFs with the high-x CLAS data?
Pia ZuritaHannu PaukkunenHannu Paukkunensubject
Hessian matrixParticle physicsPhysics and Astronomy (miscellaneous)EMC effectNuclear TheoryFOS: Physical sciencesPartonlcsh:Astrophysicshiukkasfysiikka01 natural sciences114 Physical sciencessymbols.namesakeHigh Energy Physics - Phenomenology (hep-ph)0103 physical scienceslcsh:QB460-466lcsh:Nuclear and particle physics. Atomic energy. Radioactivity010306 general physicsNuclear ExperimentEngineering (miscellaneous)Physics010308 nuclear & particles physicsddc:530530 Physiknuclear parton distribution functions (nuclear PDFs)High Energy Physics - PhenomenologyDistribution functionsymbolslcsh:QC770-798Nucleonydinfysiikkadescription
AbstractNuclear parton distribution functions (nuclear PDFs) are non-perturbative objects that encode the partonic behaviour of bound nucleons. To avoid potential higher-twist contributions, the data probing the high-x end of nuclear PDFs are sometimes left out from the global extractions despite their potential to constrain the fit parameters. In the present work we focus on the kinematic corner covered by the new high-x data measured by the CLAS/JLab collaboration. By using the Hessian re-weighting technique, we are able to quantitatively test the compatibility of these data with globally analyzed nuclear PDFs and explore the expected impact on the valence-quark distributions at high x. We find that the data are in a good agreement with the EPPS16 and nCTEQ15 nuclear PDFs whereas they disagree with TuJu19. The implications on flavour separation, higher-twist contributions and models of EMC effect are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-05-08 |