Light-cone sum rules analysis of ΞQQ′ → ΣQ′ weak decays

As a continuation of our previous work, we investigate the weak decays of doubly-heavy baryons Xi(QQ ') into sextet Sigma(Q ') with light-cone sum rules. We calculate the form factors for these decays with the parallel light-cone distribution amplitudes of Sigma(Q '). 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) and Xi(bc) decays are several orders of magnitude larger than those of Xi(bb) decays.