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arXiv · 1603.02741

Baryon Octet Electromagnetic Form Factors in a confining NJL model

Manuel E. Carrillo-Serrano·Wolfgang Bentz·Ian C. Cloët·Anthony W. Thomas
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Abstract

Electromagnetic form factors of the baryon octet are studied using a Nambu--Jona-Lasinio model which utilizes the proper-time regularization scheme to simulate aspects of colour confinement. In addition, the model also incorporates corrections to the dressed quarks from vector meson correlations in the t-channel and the pion cloud. Comparison with recent chiral extrapolations of lattice QCD results shows a remarkable level of consistency. For the charge radii we find the surprising result $r_{E}^p < r_{E}^{Σ^+}$ and $|r_{E}^n| < |r_{E}^{Ξ^0}|$, whereas the magnetic radii have a pattern largely consistent with a naive expectation based on the dressed quark masses.

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Manuel E. Carrillo-Serrano, Wolfgang Bentz, Ian C. Cloët, Anthony W. Thomas. 2016-03-08. Baryon Octet Electromagnetic Form Factors in a confining NJL model. https://doi.org/10.1016/j.physletb.2016.05.065

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