Exchange currents in octet hyperon charge radii

Abstract

Octet hyperon charge radii are calculated in a chiral constituent quark model including electromagnetic exchange currents between quarks. In impulse approximation one observes a decrease of the hyperon charge radii with increasing strangeness. This effect is reduced by exchange currents. Due to exchange currents, the charge radius of the negatively charged hyperons are close to the proton charge radius.

9 pages, 2 eps figures, RevTex, accepted for publication in Phys.Rev.C

References in corpus (3)

• Electromagnetic Form Factors of the Nucleon in an Improved Quark Model
• Radiative decays of decuplet hyperons
• Exchange Currents in Photoproduction of Baryon Resonances

Cited by in corpus (11)

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• Baryon Charge Radii and Quadrupole Moments in the 1/N_c Expansion: The 3-Flavor Case
• The electromagnetic form factors of $\Lambda$ hyperon in the vector meson dominance model
• Magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet baryons using effective quark masses in chiral constituent quark model
• Ground state baryons in the flux-tube three-body confinement model using Diffusion Monte Carlo
• SU(3)-flavour breaking in octet baryon masses and axial couplings
• Baryon Octet Electromagnetic Form Factors in a confining NJL model
• Hyperon elastic electromagnetic form factors in the space-like momentum region
• The $\Sigma$ and $\Xi$ electromagnetic form factors in the extended vector meson dominance model
• Transition magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet to $J^P={\frac{1}{2}}^{+}$ octet baryons in the chiral constituent quark model
• Method for measuring the charge radii of charged hyperons from the time-like region