Eur. Phys. J. A (2013) 49: 11
https://doi.org/10.1140/epja/i2013-13011-2

Regular Article - Theoretical Physics

Magnetic moments of the low-lying octet baryon resonances

¹ Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, 144011, Jalandhar, India
² Instituto de Física, Universidade de São Paulo, 66318, São Paulo, Brazil

^* e-mail: dahiyah@nitj.ac.in

Received: 8 October 2012
Revised: 25 November 2012
Accepted: 26 December 2012
Published online: 22 January 2013

Abstract

The magnetic moments of the negative-parity octet resonances with spin : N ^*(1535), N ^*(1650), Σ ^* (1620), and Ξ ^* (1690) have been calculated within the framework of the chiral constituent quark model. In this approach, the presence of the polarized pairs (or the meson cloud, in other words) is considered by using the Lagrangian for Goldstone boson emission from the constituent quarks. Further, the explicit contributions coming from the spin and orbital angular momentum, including the effects of the configurations mixing between the states with different spins, are obtained. The motivation for these calculations comes from the recent interest in the experimental measurement of the magnetic moment of the S ₁₁ (1535) resonance and of similar calculations being done within lattice quantum chromodynamics approaches. Our results can be compared with those expected to come from these sources.