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Applicability of pion-nucleus Drell-Yan data in global analysis of nuclear parton distribution functions
Hannu PaukkunenHannu PaukkunenHannu PaukkunenPetja PaakkinenKari J. EskolaKari J. Eskolasubject
QuarkDrell-Yan processParticle physicsNuclear and High Energy PhysicsNuclear Theorymedia_common.quotation_subjectNuclear TheoryDrell–Yan processFOS: Physical sciencesPartonhiukkasfysiikka01 natural sciencesAsymmetry114 Physical sciencesHigh Energy Physics - ExperimentNuclear Theory (nucl-th)Nuclear physicsHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)PionRATIO0103 physical sciencesmedicinePion–nucleus scatteringNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear theoryNuclear Experimentmedia_commonPhysicsta114010308 nuclear & particles physicskvarkitHigh Energy Physics::PhenomenologyDrell–Yan processNuclear parton distribution functionsPion-nucleus scatteringlcsh:QC1-999pion–nucleus scatteringnuclear parton distribution functionsHigh Energy Physics - PhenomenologyDistribution functionmedicine.anatomical_structureDIMUON PRODUCTIONHigh Energy Physics::ExperimentNucleusPDFSlcsh:Physicsdescription
Despite the success of modern nuclear parton distribution functions (nPDFs) in describing nuclear hard-process data, they still suffer from large uncertainties. One of the poorly constrained features is the possible asymmetry in nuclear modifications of valence $u$ and $d$ quarks. We study the possibility of using pion-nucleus Drell-Yan dilepton data as a new constraint in the global analysis of nPDFs. We find that the nuclear cross-section ratios from the NA3, NA10 and E615 experiments can be used without imposing significant new theoretical uncertainties and, in particular, that these datasets may have some constraining power on the $u$/$d$ -asymmetry in nuclei.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-02-11 |