6533b7d2fe1ef96bd125ec1e
RESEARCH PRODUCT
LHC data challenges the contemporary parton-to-hadron fragmentation functions
David D'enterriaIlkka HeleniusHannu PaukkunenKari J. Eskolasubject
PhysicsParticle physicsLarge Hadron ColliderNuclear TheoryHadronNuclear TheoryHigh Energy Physics::PhenomenologyFragmentation (computing)Perturbative QCDFOS: Physical sciencesScale (descriptive set theory)PartonHigh Energy Physics - ExperimentNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentNuclear ExperimentParticle Physics - Phenomenologydescription
We discuss the inclusive high-pT charged-particle production in proton-proton collisions at the LHC. The experimental data are compared to the NLO perturbative QCD calculations employing various sets of parton-to-hadron fragmentation functions. Most of the theoretical predictions are found to disastrously overpredict the measured cross sections, even if the scale variations and PDF errors are accounted for. The problem appears to arise from the presently too hard gluon-to-hadron fragmentation functions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-08-20 |