Magnetic moments of heavy baryons

Abstract

The first nontrivial chiral corrections to the magnetic moments of triplet (T) and sextet ${(S}^{(*)})$ heavy baryons are calculated using heavy hadron chiral perturbation theory. Since magnetic moments of the T hadrons vanish in the limit of infinite heavy quark mass ${(m}_{Q}\ensuremath{\rightarrow}\ensuremath{\infty}),$ these corrections occur at order $\mathcal{O}({1/(m}_{Q}{\ensuremath{\Lambda}}_{\ensuremath{\chi}}^{2}))$ for T baryons, while for ${S}^{(*)}$ baryons they are of order $\mathcal{O}(1/{\ensuremath{\Lambda}}_{\ensuremath{\chi}}^{2}).$ The renormalization of the chiral loops is discussed, and relations among the magnetic moments of different hadrons are provided. Previous results for T baryons are revised.