Parton distributions of light quarks and antiquarks in the proton

Lei Chang, Fei Gao, Craig D. Roberts*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

An algebraic Ansatz for the proton's Poincaré-covariant wave function, which includes both scalar and pseudovector diquark correlations, is used to calculate proton valence, sea, and glue distribution functions (DFs). Regarding contemporary data, a material pseudovector diquark component in the proton is necessary for an explanation of the neutron-proton structure function ratio; and a modest Pauli blocking effect in the gluon splitting function is sufficient to explain the proton's light-quark antimatter asymmetry. In comparison with pion DFs, the light-front momentum fractions carried by all identifiable parton classes are the same; on the other hand, the higher moments are different. Understanding these features may provide insights that explain distinctions between Nambu-Goldstone bosons and seemingly less complex hadrons.

Original languageEnglish
Article number137078
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume829
DOIs
Publication statusPublished - 10 Jun 2022
Externally publishedYes

Keywords

  • Continuum Schwinger function methods
  • Emergence of mass
  • Nonperturbative quantum field theory
  • Parton distributions
  • Proton structure
  • Strong interactions in the standard model of particle physics

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