Study on Ξcc→Ξc and Ξcc→Ξc′ weak decays in the light-front quark model

In this work we study the weak decays of Ξ cc → Ξ c and Ξ cc → Ξ c ′ in the light-front quark model. Generally, a naive, but reasonable conjecture suggests that the cc subsystem in Ξ cc ( us pair in Ξ c ( ′ ) ) stands as a diquark with definite spin and color assignments. During the concerned processes, the diquark of the initial state is not a spectator, namely must be broken. A Racah transformation would decompose the original ( cc ) q into a combination of c ( cq ) components. Thus we may deal with the decaying c quark alone while keeping the ( cq ) subsystem as a spectator. With the re-arrangement of the inner structure we calculate the form factors numerically and then obtain the rates of semi-leptonic decays and non-leptonic decays, which will be measured in the future.