Parton distributions of light quarks and antiquarks in the proton

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.

8 pages, 2 figures, 1 table

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Cited by in corpus (15)

• QCD Running Couplings and Effective Charges
• Emergence of pion parton distributions
• Proton and pion distribution functions in counterpoint
• Valence quark ratio in the proton
• Hadron and light nucleus radii from electron scattering
• Nucleon axial form factor at large momentum transfers
• Origin of the Proton Mass
• Contact interaction analysis of octet baryon axialvector and pseudoscalar form factors
• Polarised parton distribution functions and proton spin
• Composition of low-lying $\mathbf{J}={\frac{3}{2}}^{\pm }\mathbf{\Delta }$-baryons
• Measurement of flavor asymmetry of light-quark sea in the proton with Drell-Yan dimuon production in $p+p$ and $p+d$ collisions at 120 GeV
• Gluon mass scale through the Schwinger mechanism
• Hadron Structure using Continuum Schwinger Function Methods
• Space-like Electromagnetic Form Factors of Lambda- and Sigma-Baryons from Quark-Diquark Faddeev Equations
• Flavor asymmetry from the non-perturbative nucleon sea