6533b7d0fe1ef96bd125babc
RESEARCH PRODUCT
EPPS16: Nuclear parton distributions with LHC data
Petja PaakkinenCarlos A. SalgadoHannu PaukkunenHannu PaukkunenHannu PaukkunenKari J. EskolaKari J. Eskolasubject
QuarkParticle physicsPhysics and Astronomy (miscellaneous)Nuclear TheoryNuclear TheoryFOS: Physical sciencesPartonhiukkasfysiikka114 Physical sciences01 natural sciences7. Clean energyHigh Energy Physics - ExperimentNuclear Theory (nucl-th)High Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)PionINELASTIC MUON SCATTERINGpartonit0103 physical sciencesNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentPLUS PB COLLISIONSEngineering (miscellaneous)Nuclear ExperimentPhysicsGauge bosonnuclear partonsLarge Hadron Collider010308 nuclear & particles physicsLEADING ORDERHigh Energy Physics::PhenomenologyLEPTON CHARGE ASYMMETRYSTRUCTURE-FUNCTION RATIOSDeep inelastic scatteringPPB COLLISIONSGluonnuclear parton distribution functionsHigh Energy Physics - PhenomenologyDIMUON PRODUCTIONPERTURBATION-THEORYJET CROSS-SECTIONSHigh Energy Physics::ExperimentHADRON-COLLISIONSRegular Article - Theoretical PhysicsNeutrinodescription
We introduce a global analysis of collinearly factorized nuclear parton distribution functions (PDFs) including, for the first time, data constraints from LHC proton-lead collisions. In comparison to our previous analysis, EPS09, where data only from charged-lepton-nucleus deep inelastic scattering (DIS), Drell-Yan (DY) dilepton production in proton-nucleus collisions and inclusive pion production in deuteron-nucleus collisions were the input, we now increase the variety of data constraints to cover also neutrino-nucleus DIS and low-mass DY production in pion-nucleus collisions. The new LHC data significantly extend the kinematic reach of the data constraints. We now allow much more freedom for the flavour dependence of nuclear effects than in other currently available analyses. As a result, especially the uncertainty estimates are more objective flavour by flavour. The neutrino DIS plays a pivotal role in obtaining a mutually consistent behaviour for both up and down valence quarks, and the LHC dijet data clearly constrain gluons at large momentum fraction. Mainly for insufficient statistics, the pion-nucleus DY and heavy gauge boson production in proton-lead collisions impose less visible constraints. The outcome - a new set of next-to-leading order nuclear PDFs called EPPS16 - is made available for applications in high-energy nuclear collisions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-03-01 |