Generalized parton distributions of sea quarks in the proton from nonlocal chiral effective theory

Abstract

We calculate the spin-averaged generalized parton distributions (GPDs) of sea quarks in the proton at zero skewness from nonlocal covariant chiral effective theory, including one-loop contributions from intermediate states with pseudoscalar mesons and octet and decuplet baryons. A relativistic regulator is generated from the nonlocal Lagrangian where a gauge link is introduced to guarantee local gauge invariance, with additional diagrams from the expansion of the gauge link ensuring conservation of electric charge and strangeness. Flavor asymmetries for sea quarks at zero and finite momentum transfer, as well as strange form factors, are obtained from the calculated GPDs, and results compared with phenomenological extractions and lattice QCD.

71 pages, 10 figures

References in corpus (16)

• Exploring hadrons' partonic structure using ab initio lattice QCD calculations
• Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
• The Asymmetry of Antimatter in the Proton
• Impact of CLAS and COMPASS data on Polarized Parton Densities and Higher Twist
• Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays
• Electromagnetic structure of the lowest-lying decuplet resonances in covariant chiral perturbation theory
• Chiral extrapolation of nucleon magnetic form factors
• The Strangest Proton?
• Longitudinal target-spin asymmetries for deeply virtual Compton scattering
• Strange quark asymmetry in the proton in chiral effective theory
• Generalized parton distributions in a meson cloud model
• Electromagnetic form factors of octet baryons with the nonlocal chiral effective theory
• Generalized parton distributions and Deeply Virtual Compton Scattering in Color Glass Condensate model
• Large-N Summation of Chiral Logs for Generalized Parton Distributions
• Strange quark helicity in the proton from chiral effective theory
• Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data

Cited by in corpus (5)

• Generalized parton distributions of sea quark at zero skewness in the light-cone Model
• Chiral Analysis of the Nucleon Mass and Sigma Commutator
• Flavor asymmetry from the non-perturbative nucleon sea
• Sea contribution to the charge radii and quadrupole moment of $J^P={\frac{1}{2}}^{+},{\frac{3}{2}}^{+}$ baryons
• Contributions to the nucleon form factors from bubble and tadpole diagrams