Eur. Phys. J. Plus (2025) 140: 621
https://doi.org/10.1140/epjp/s13360-025-06565-w

Regular Article

Electric, magnetic and “effective” form factors of the spin$-{\frac{1}{2}}^{+}$ low lying $\mathrm{\Sigma }$, $\mathrm{\Xi }$ and $\mathrm{\Lambda }$ hyperons

Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, 144008, Jalandhar, India

^a dahiyah@nitj.ac.in

Received: 1 April 2025
Accepted: 19 June 2025
Published online: 2 July 2025

Abstract

Inspired by the recent precise data of the $e^{+}{e}^{-}\to Y\overline{Y}$ processes in the timelike region, I present the electric and magnetic form factors (EMFFs) of the spin$-{\frac{1}{2}}^{+}$ low lying $\mathrm{\Sigma }$, $\mathrm{\Xi }$ and $\mathrm{\Lambda }$ hyperons $\left(G_E^{\mathrm{\Sigma },\mathrm{\Xi },\mathrm{\Lambda }}(Q^2)\text{and}{G}_M^{\mathrm{\Sigma },\mathrm{\Xi },\mathrm{\Lambda }}(Q^2)\right)$. The phenomenological calculations have been performed in the chiral constituent quark model ($\chi$CQM) which has been successful in describing the internal structure and dynamics of the nucleon. The model takes into account the explicit contributions from the valence quarks, sea quarks and sea orbital angular momentum. The magnetic form factors are further parameterized in terms of a dipole form to study the incorporation of $Q^2$ phenomenologically. I have also computed the “effective” form factors of the hyperons ${\left|G^{\mathrm{\Sigma },\mathrm{\Xi },\mathrm{\Lambda }}(Q^2)\right|}^2$ which are derived from the total integrated cross section of $e^{+}{e}^{-}\to Y\overline{Y}$ from Babar, CLEO-c and BESIII experiments.