Eur. Phys. J. A (2016) 52: 34
https://doi.org/10.1140/epja/i2016-16034-1

Regular Article - Theoretical Physics

Hyperon elastic electromagnetic form factors in the space-like momentum region

¹ Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, 35392, Giessen, Germany
² Institut für Physik, Karl-Franzens-Universität Graz, 8010, Graz, Austria

^* e-mail: helios.sanchis-alepuz@uni-graz.at

Received: 3 December 2015
Accepted: 1 January 2016
Published online: 24 February 2016

Abstract

We present a calculation of the electric and magnetic form factors of ground-state octet and decuplet baryons including strange quarks. We work with a combination of Dyson-Schwinger equations for the quark propagator and covariant Bethe-Salpeter equations describing baryons as bound states of three (non-perturbative) quarks. Our form factors for the octet baryons are in good agreement with corresponding lattice data at finite Q²; deviations in some isospin channels for the magnetic moments can be explained by missing meson cloud effects. At larger Q² our quark core calculation has predictive power for both, the octet and decuplet baryons.