We have systematically investigated the spin-3 2 to spin-1 2 doubly charmed baryon transition magnetic moments to the next-to-next-to-leading order in the heavy baryon chiral perturbation theory (HBChPT). Numerical results of transition magnetic moments and decay widths are presented to the next-to-leading order: µ Ξ * ++ cc →Ξ ++ cc = −2.35µN , µ Ξ * + cc →Ξ + cc = 1.55µN , µ Ω * + cc →Ω + cc = 1.54µN , Γ Ξ * ++ cc →Ξ ++ cc = 22.0 keV, Γ Ξ * + cc →Ξ + cc = 9.57 keV, Γ Ω * + cc →Ω + cc = 9.45 keV.

The chiral corrections to the magnetic moments of the spin-1 2 doubly charmed baryons are systematically investigated up to next-to-next-to-leading order with heavy baryon chiral perturbation theory (HBChPT). The numerical results are calculated up to next-to-leading order:= 0.78µN . We also calculate the magnetic moments of the other doubly heavy baryons, including the doubly bottomed baryons (bbq) and the doubly heavy baryons containing a light quark, a charm quark and a bottom quark ({bc}q and [bc]q):

In this work, we investigate the chiral corrections to the magnetic moments of the spin-3 2 doubly charmed baryons systematically up to next-to-next-to-leading order with the heavy baryon chiral perturbation theory. The numerical results are given up to next-to-leading order:As a byproduct, we have also calculated the magnetic moments of the spin-3 2 doubly bottom baryons and charmed bottom baryons:

In this paper, we have calculated the magnetic moments of the hidden-charm strange pentaquark in the molecular model, diquark-diquark-antiquark model and diquark-triquark model. Numerical results show that the magnetic moments of hidden-charm strange pentaquark are different not only in different angular momentum coupling methods with the same model but also in different models with the same angular momentum.

We have systematically investigated the decuplet (T) to octet (B) baryon (T → Bγ) transition magnetic moments to the next-to-next-to-leading order and electric quadruple moments to the nextto-leading order in the framework of the heavy baryon chiral perturbation theory. Our calculation includes the contributions from both the intermediate decuplet and octet baryon states in the loops. Our results show reasonably good convergence of the chiral expansion and agreement with the experimental data. The analytical expressions may be useful to the chiral extrapolation of the lattice simulations of the decuplet electromagnetic properties.