Intrinsic quadrupole moment of the nucleon

Abstract

We address the question of the intrinsic quadrupole moment Q_0 of the nucleon in various models. All models give a positive intrinsic quadrupole moment for the proton. This corresponds to a prolate deformation. We also calculate the intrinsic quadrupole moment of the Delta(1232). All our models lead to a negative intrinsic quadrupole moment of the Delta corresponding to an oblate deformation.

17 pages, 5 figures

References in corpus (1)

• Large N_c, Constituent Quarks, and N, Delta Charge Radii

Cited by in corpus (48)

• Electromagnetic excitation of the Delta(1232)-resonance
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Electroexcitation of nucleon resonances
• A pure S-wave covariant model for the nucleon
• Single pi+ Electroproduction on the Proton in the First and Second Resonance Regions at 0.25GeV^2 < Q^2 < 0.65GeV^2 Using CLAS
• Quark transverse charge densities in the $\Delta (1232)$ from lattice QCD
• D-state effects in the electromagnetic N-Delta transition
• Recoil Polarization for Delta Excitation in Pion Electroproduction
• Quadrupole Moments of N and Delta in the 1/N_c Expansion
• Electric quadrupole and magnetic octupole moments of the Delta
• Quadrupole moments of baryons
• Valence quark contribution for the gamma N -> Delta quadrupole transition extracted from lattice QCD
• Electromagnetic N->Delta transition and neutron form factors
• Electromagnetic form factors of the Delta with D-waves
• N to Delta electromagnetic transition form factors from Lattice QCD
• Probing hadron wave functions in Lattice QCD
• ${\Omega }_c\gamma \to {\Omega }_c^{\ast }$ transition in lattice QCD
• Recoil Polarization Measurements for Neutral Pion Electroproduction at Q^2=1 (GeV/c)^2 Near the Delta Resonance
• The shape of the nucleon
• Deviation of the Nucleon Shape From Spherical Symmetry: Experimental Status
• Electromagnetic Transition Form Factors of Baryon Resonances
• Electromagnetic transitions of the singly charmed baryons with spin 3/2
• Axial $N\to \Delta (1232)$ and $N\to N^{\star }(1440)$ transition form factors
• Baryon octupole moments
• Magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet baryons using effective quark masses in chiral constituent quark model
• Electric Quadrupole and Magnetic Octupole Moments of the Light Decuplet Baryons Within Light Cone QCD Sum Rules
• The shape of the $\Delta$ baryon in a covariant spectator quark model
• Electric quadrupole moment and the tensor magnetic polarizability of twisted electrons and a potential for their measurements
• $N^{\ast }$ Form Factors based on a Covariant Quark Model
• Improved empirical parametrizations of the ${\gamma }^{\ast }N\to \Delta (1232)$ and ${\gamma }^{\ast }N\to N(1520)$ helicity amplitudes and the Siegert's theorem
• Axial exchange currents and nucleon spin
• Lattice QCD study of the elastic and transition form factors of charmed baryons
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• New low-$Q^2$ measurements of the ${\gamma }^{\ast }N\to \Delta (1232)$ Coulomb quadrupole form factor, pion cloud parametrizations and Siegert's theorem
• The Matter and the Pseudoscalar Densities in Lattice QCD
• Transition magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet to $J^P={\frac{1}{2}}^{+}$ octet baryons in the chiral constituent quark model
• Spin of ground state baryons
• Nucleon deformation and atomic spectroscopy
• Non-spherical proton shape and hydrogen hyperfine splitting
• Hadron deformation from Lattice QCD
• Electromagnetic multipole moments of baryons
• Electromagnetic properties of the $d^{\ast }(2380)$ hexaquark
• Combined parametrization of the neutron electric form factor and the ${\gamma }^{\ast }N\to \Delta (1232)$ quadrupole form factors
• Three quark currents and baryon spin
• Sea contribution to the charge radii and quadrupole moment of $J^P={\frac{1}{2}}^{+},{\frac{3}{2}}^{+}$ baryons
• Ernest Henley and the shape of baryons
• Baryon quadrupole moment in the 1/N(c) expansion of QCD
• Symmetry/asymmetry within a cylindrical lattice model of nuclear structure predicts cosmic abundance/scarcity