Speaker
Description
In recent years, there have been many discoveries in the spectroscopy of hadrons containing heavy quarks. Almost all baryons containing a single heavy quark are discovered in experiments. The quark model predicts the existence of many baryons with double heavy quarks. Among the possible double heavy baryons, only $\Xi^{+}_{cc}$ and $\Xi^{++}_{cc}$ have been experimentally observed in LHCb.
Flavor-changing neutral current (FCNC) processes represent a promising platform for precise testing of SM as well as looking for new physics beyond the SM.
In this study, the weak decays of spin-1/2 double heavy baryons to spin-3/2 single heavy baryons induced by FCNC are studied within the light cone QCD sum rules method. First, the transition form factors of $\Xi_{bb}^{0,-} \rightarrow \Xi_b^{*{0,-}} \bar \ell \ell$, $\Xi_{bb}^{0,-} \rightarrow \Sigma_b^{*{0,-}} \bar \ell \ell$, $\Xi_{cc}^{++,+} \rightarrow \Sigma_c^{*{++,+}} \bar \ell \ell$, $\Omega_{bb}^{-} \rightarrow \Xi_b^{*{-}} \bar \ell \ell$, $\Omega_{bb}^{-} \rightarrow \Sigma_b^{*{-}} \bar \ell \ell$, $\Omega_{cc}^{+} \rightarrow \Xi_c^{*{+}} \bar \ell \ell$ decays are calculated. Then by using the results for the form factors, the corresponding decay widths are estimated.
