Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach

Abstract

Light-cone sum rules are used to investigate the electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons by using the Ioffe type interpolating currents. The sum rules are affected to some extent by the choice of the interpolating currents from a comparison. Numerical calculations show that the magnetic form factor can be well fitted by the dipole formula for $\Sigma$ but not for $\Lambda$. The magnetic form factor of $\Lambda$ approaches zero with the momentum transfer faster than the dipole formula estimation.

17 pages, 14 figures, accepted for publication in Phys. Rev. D

References in corpus (8)

• Nucleon Electromagnetic Form Factors
• Nucleon electromagnetic form factors
• Nucleon Form Factors in QCD
• Time- and Spacelike Nucleon Electromagnetic Form Factors beyond Relativistic Constituent Quark Models
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• Higher order light-cone distribution amplitudes of the Lambda baryon
• Electromagnetic form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach
• Space-like Electromagnetic Form Factors of Lambda- and Sigma-Baryons from Quark-Diquark Faddeev Equations
• Octet negative parity to octet positive parity electromagnetic transitions in light cone QCD