Applicability of pion-nucleus Drell-Yan data in global analysis of nuclear parton distribution functions

Abstract

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.

arXiv comment6 pages, 6 figures

References in corpus (13)

• New parton distribution functions from a global analysis of quantum chromodynamics
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• nCTEQ15 - Global analysis of nuclear parton distributions with uncertainties in the CTEQ framework
• Uncertainties of Predictions from Parton Distribution Functions I: the Lagrange Multiplier Method
• Global Analysis of Nuclear Parton Distributions
• Shadowing in Inelastic Scattering of Muons on Carbon, Calcium and Lead at Low XBj
• The Challenge of the EMC Effect: existing data and future directions
• Nuclear Antishadowing in Neutrino Deep Inelastic Scattering
• Agreement of Neutrino Deep Inelastic Scattering Data with Global Fits of Parton Distributions
• Parity-violating DIS and the flavour dependence of the EMC effect
• An analysis of the impact of LHC Run I proton-lead data on nuclear parton densities
• Nuclear PDFs in the beginning of the LHC era
• Pion-induced Drell-Yan processes and the flavor-dependent EMC effect

Cited by in corpus (7)

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• Nuclear PDFs After the First Decade of LHC Data
• Exposing Novel Quark and Gluon Effects in Nuclei
• Initial-state energy loss in cold QCD matter and the Drell-Yan process
• EPPS16 - Bringing nuclear PDFs to the LHC era
• EPPS16 - First nuclear PDFs to include LHC data
• EPPS21: A global QCD analysis of nuclear PDFs