Magnetic moments of the low-lying JP = 1/2-, 3/2- $\Lambda$ resonances within the framework of the chiral quark model

Abstract

The magnetic moments of the low-lying spin-parity J P = 1/2 − , 3/2 − Λ resonances, like, for example, Λ(1405) 1/2 − , Λ(1520) 3/2 − , as well as their transition magnetic moments, are calculated using the chiral quark model. The results found are compared with those obtained from the nonrelativistic quark model and those of unitary chiral theories, where some of these states are generated through the dynamics of two hadron coupled channels and their unitarization.

Magnetic moments ofJP=32−baryons in QCD

“…The apparent small deviation can again be attributed to the SU(3) symmetry breaking effects. As has already been noted, in literature there is only one work where the magnetic moment of the negative parity, spin-3=2 Λ baryon is calculated within the framework of the chiral quark model [13]. Our prediction is about 30% larger than the one presented in [13].…”

“…It should be mentioned here that, theoretically there exists only one work where magnetic moment of the negative parity, spin-3=2 Λ-baryon is calculated in the framework of the chiral quark model [13]. Note also that the magnetic moments of the spin-3=2 positive parity baryons are calculated within the LCSR in [14].…”