Suggested search for doubly charmed baryons of $J^P=3/2^{+}$ via their electromagnetic transitions

We use the method of light-cone sum rules to study the electromagnetic transition of the ${\mathrm{\Xi }}_{cc}^{*++}$ into ${\mathrm{\Xi }}_{cc}^{++}\gamma$, whose decay width is estimated to be ${13.7}_{-7.9}^{+17.7}\mathrm{keV}$. This value is large enough for the ${\mathrm{\Xi }}_{cc}^{*++}$ to be observed in the ${\mathrm{\Xi }}_{cc}^{++}\gamma$ channel, and we propose to continually search for it in future LHCb and BelleII experiments.

Figure 1

The coupling constant $g_{{\mathrm{\Xi }}_{cc}^{*++}\to {\mathrm{\Xi }}_{cc}^{++}\gamma }$ as a function of the Borel mass $M_B$.