Strong and radiative decays of the doubly charmed baryons

We have systematically studied the strong and radiative decays of the low-lying 1P-wave doubly charmed baryons. Some interesting observations are: (i) The states. Xi*(cc) and Omega*(cc) with J(P) = 3/2(+) have a fairly large decay rate into the Xi(cc)gamma and Omega(cc)gamma channels with a width similar to 15 and similar to 7 keV, respectively. (ii) The lowest lying excited doubly charmed baryons are dominated by the 1P. mode excitations, which should be quite narrow states. They decay into the ground state with J(P) = 1/2(+) through the radiative transitions with a significant ratio. (iii) The total decay widths of the first orbital excitations of lambda mode (1P(lambda) states with J(P) = 1/2(-), 3/2(-), 5/2(-)) are about Gamma similar to 100 MeV, and the ratio between the radiative and hadronic decay widths is about O(10(-3)).