pith. machine review for the scientific record. sign in

arxiv: 1804.01965 · v2 · submitted 2018-04-05 · ✦ hep-ph · hep-ex· nucl-th

Recognition: unknown

First Monte Carlo global QCD analysis of pion parton distributions

P. C. Barry , N. Sato , W. Melnitchouk , Chueng-Ryong Ji
Authors on Pith no claims yet
classification ✦ hep-ph hep-exnucl-th
keywords pionanalysisdatapdfscarlochiraldrell-yanfirst
0
0 comments X
read the original abstract

We perform the first global QCD analysis of parton distribution functions (PDFs) in the pion, combining $\pi A$ Drell-Yan data with leading neutron electroproduction from HERA within a Monte Carlo approach based on nested sampling. Inclusion of the HERA data allows the pion PDFs to be determined down to much lower values of $x$, with relatively weak model dependence from uncertainties in the chiral splitting function. The combined analysis reveals that gluons carry a significantly higher pion momentum fraction, $\sim 30\%$, than that inferred from Drell-Yan data alone, with sea quarks carrying a somewhat smaller fraction, $\sim 15\%$, at the input scale. Within the same effective theory framework, the chiral splitting function and pion PDFs can be used to describe the $\bar d-\bar u$ asymmetry in the proton.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Pion parton distribution functions and pion-nucleus induced $J/\psi$ production in extended light-front holographic QCD

    hep-ph 2026-05 unverdicted novelty 5.0

    Pion PDFs from holographic light-front QCD are consistent with global analyses and produce J/ψ cross sections matching experimental data across energies and targets.

  2. Pion parton distribution functions and pion-nucleus induced $J/\psi$ production in extended light-front holographic QCD

    hep-ph 2026-05 unverdicted novelty 4.0

    Pion PDFs derived from holographic light-front wave functions yield NLO J/ψ production cross sections in pion-nucleus collisions that agree with data.

  3. Extraction of Pion Unpolarized Quark Generalized Parton Distribution from Charge Form Factors

    hep-ph 2026-04 unverdicted novelty 4.0

    Pion unpolarized quark GPDs at zero skewness are extracted from a data-driven fit to the electromagnetic form factor and PDFs using a parameterized form factor embedded in a PDF-plus-profile GPD framework.

  4. Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report

    physics.ins-det 2021-03 accept novelty 2.0

    The EIC Yellow Report specifies the science goals, required detector capabilities, and technology concepts needed to realize a high-luminosity electron-ion collider program.