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 language | English |
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Article number | 137078 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 829 |
DOIs | |
Publication status | Published - 10 Jun 2022 |
Externally published | Yes |
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