Uncertainties in determining parton distributions at largex

2011/02/28 by A. Accardi, Alberto Accardi, Wally Melnitchouk +8 · 4 citations
Physics and Astronomy · #Distribution function #Gluon #High-Energy Particle Collisions Research #Large Hadron Collider #Luminosity #Nuclear physics #Parametrization (atmospheric modeling) #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Tevatron #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevd.84.014008

published as Phys.Rev.D84:014008,2011 · 37 pages, 13 figures. Final published version

openalex publication_date 2011/07/06 · arxiv created 2011/07/11 · arxiv updated 2011/08/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We critically examine uncertainties in parton distribution functions (PDFs) at large x arising from nuclear effects in deuterium F₂ structure function data. Within a global PDF analysis, we assess the impact on the PDFs from uncertainties in the deuteron wave function at short distances and nucleon off-shell effects, from the use of relativistic kinematics, and from the use of a less restrictive parametrization of the d/u ratio. We find, in particular, that the d-quark and gluon PDFs vary significantly with the choice of nuclear model. We highlight the impact of these uncertainties on the determination of the neutron structure functions, and on W boson production and parton luminosity at the Tevatron and the LHC. Finally, we discuss prospects for new measurements sensitive to the d-quark and gluon distributions but insensitive to nuclear corrections.

Citations

• 3-, 4-, and 5-flavor next-to-next-to-leading order parton distribution functions from deep-inelastic-scattering data and at hadron colliders
• Deep inelastic scattering fromA=3nuclei and the neutron structure function
• Nuclear Shadowing and Extraction ofF2p−F2nat Smallxfrom Deuteron Collider Data
• High-precision, charge-dependent Bonn nucleon-nucleon potential
• Combined measurement and QCD analysis of the inclusive e ± p scattering cross sections at HERA
• Covariant spectator theory ofnpscattering: Phase shifts obtained from precision fits to data below 350 MeV
• Relativistic deuteron structure function
• structure function ratio at large x

Cited by

• ConstrainedγZinterference corrections to parity-violating electron scattering
• Quasielastic electron-deuteron scattering in the weak-binding approximation
• Parton Distributions in Nucleons and Nuclei
• The gluon and charm content of the deuteron