Orbital angular momentum of the proton and intrinsic five-quark Fock states

Abstract

The orbital angular momentum ($L_q$) of the proton is studied by employing the extended constituent quark model. Contributions from different flavors, namely, up, down, strange, and charm quarks in the proton are investigated. Probabilities of the intrinsic $q\bar{q}$ pairs are calculated using a ${}^3{P}_0$ transition operator to fit the sea flavor asymmetry $I_a=\bar{d}-\bar{u}=0.118\pm 0.012$ of the proton. Our numerical results lead to $L_q=0.158\pm 0.014$, in agreement with $4/3I_a=0.157\pm 0.016$, and consistent with findings based on various other approaches.

arXiv commenttypos corrected

References in corpus (34)

• The Spectrum of the Nucleons and the Strange Hyperons and Chiral Dynamics
• The Spin Structure of the Nucleon
• Improved Measurement of the $\bar{d}/\bar{u}$ Asymmetry in the Nucleon Sea
• The angular momentum controversy: What's it all about and does it matter?
• Precise determination of the spin structure function ${\mathbf{g}}_1$ of the proton, deuteron and neutron
• Measurements of the $Q^2$-Dependence of the Proton and Neutron Spin Structure Functions g1p and g1n
• Parton distributions and lattice QCD calculations: a community white paper
• Quark Wigner Distributions and Orbital Angular Momentum
• The Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-inelastic Scattering
• Spin Structure of the Nucleon - Status and Recent Results
• The quark orbital angular momentum from Wigner distributions and light-cone wave functions
• The nucleon spin and momentum decomposition using lattice QCD simulations
• A review of the intrinsic heavy quark content of the nucleon
• Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s}=200$ GeV
• Interplay of Spin and Orbital Angular Momentum in the Proton
• Is gauge-invariant complete decomposition of the nucleon spin possible ?
• Inclusive double-helicity asymmetries in neutral pion and eta meson production in $\vec{p}+\vec{p}$ collisions at $\sqrt{s}=200$ GeV
• Unquenched quark model for baryons: magnetic moments, spins and orbital angular momenta
• Resolution of the Proton Spin Problem
• Lorentz Symmetry and the Internal Structure of the Nucleon
• Flavor Structure of the Nucleon Sea
• The Charm and Bottom Hyperons in a Chiral Quark Model
• Determination of the Proton Spin Structure Functions for 0.05 < Q^2 < 5 GeV^2 using CLAS
• Strangeness spin, magnetic moment and strangeness configurations of the proton
• Evidence for the Absence of Gluon Orbital Angular Momentum in the Nucleon
• The Parton Orbital Angular Momentum: Status and Prospects
• Taming the Pion Cloud of the Nucleon
• Intrinsic charm content of the nucleon and charmness-nucleon sigma term
• Sea flavor content of octet baryons and intrinsic five-quark Fock states
• Strangeness Suppression in q-qbar Creation Observed in Exclusive Reactions
• Orbital Angular Momentum in the Nucleon
• Strangeness magnetic form factor of the proton in the extended chiral quark model
• Intrinsic light and strange quark--antiquark pairs in the proton and nonperturbative strangeness suppression
• Phenomenological analysis of nucleon strangeness and meson-nucleon sigma terms

Cited by in corpus (3)

• The axial charges of proton within an extended chiral constituent quark model
• Investigations on the flavor-dependent axial charges of the octet baryons
• The quark orbital angular momentum of ground state octet baryons