Light-cone sum rules analysis of $$\Xi _{QQ^{\prime }}\rightarrow \Sigma _{Q^{\prime }}$$ weak decays

Abstract

AbstractAs a continuation of our previous work, we investigate the weak decays of doubly-heavy baryons $$\Xi _{QQ^{\prime }}$$ΞQQ′ into sextet $$\Sigma _{Q^{\prime }}$$ΣQ′ with light-cone sum rules. We calculate the form factors for these decays with the parallel light-cone distribution amplitudes of $$\Sigma _{Q^{\prime }}$$ΣQ′. Numerical results of these form factors are used to predict the decay widths and branching ratios of the corresponding semi-leptonic processes. Parametric uncertainties and theoretical analyses are also given in detail. We find that the decay widths of $$\Xi _{cc}$$Ξcc and $$\Xi _{bc}$$Ξbc decays are several orders of magnitude larger than those of $$\Xi _{bb}$$Ξbb decays.