Electromagnetic Structure of Light Baryons in Lattice QCD

Abstract

A method in which electromagnetic properties of hadrons are studied by direct simulation of dynamical photon effects is applied to the extraction of the isomultiplet structure of the octet baryons. Using 187 configurations at $\beta =5.7$ with Wilson action, and up and down quark masses determined from the meson spectrum, the nucleon splitting is found to be $1.55(\pm 0.56\mathrm{stat})$ MeV; the hyperon splittings are found to be ${\Sigma }^0-{\Sigma }^{+}=2.47\pm 0.39$, ${\Sigma }^{-}-{\Sigma }^0=4.63\pm 0.36$, ${\Xi }^{-}-{\Xi }^0=5.68\pm 0.24$ MeV. Estimated systematic corrections arising from finite volume and the quenched approximation are included in these results.

Talk presented at LATTICE96(phenomenology)

References in corpus (1)

• Electromagnetic Splittings and Light Quark Masses in Lattice QCD

Cited by in corpus (4)

• Determination of light quark masses from the electromagnetic splitting of pseudoscalar meson masses computed with two flavors of domain wall fermions
• Cascade production in the reactions gamma p --> K+ K+ (X) and gamma p --> K^+ K^+ pi- (X)
• 70 Years of Hyperon Spectroscopy: A review of strange $\Xi$, $\Omega$ baryons, and the spectrum of charmed and bottom baryons
• The u-d quark mass difference and nuclear charge symmetry breaking