English

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

High Energy Physics - Phenomenology 2016-03-03 v3 High Energy Physics - Experiment Nuclear Theory

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 Q2Q^2; deviations in some isospin channels for the magnetic moments can be explained by missing meson cloud effects. At larger Q2Q^2 our quark core calculation has predictive power for both, the octet and decuplet baryons.

Keywords

Cite

@article{arxiv.1512.00833,
  title  = {Hyperon elastic electromagnetic form factors in the space-like momentum region},
  author = {Helios Sanchis-Alepuz and Christian S. Fischer},
  journal= {arXiv preprint arXiv:1512.00833},
  year   = {2016}
}

Comments

14 pages, 6 figures, 7 tables. Version 2: layout improved. Version 3: Matches the published version