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
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.
© SIF, Springer-Verlag Berlin Heidelberg, 2016