Strong coupling constants of the doubly heavy Xi(QQ) Baryons with pi Meson

Abstract

The doubly charmed Xi(++)(cc) (ccu ) state is the only listed baryon in PDG, which was discovered in the experiment. The LHCb collaboration gets closer to discovering the second doubly charmed baryon Xi(+)(cc) (ccd), hence the investigation of the doubly charmed/bottom baryons from many aspects is of great importance that may help us not only get valuable knowledge on the nature of the newly discovered states, but also in the search for other members of the doubly heavy baryons predicted by the quark model. In this context, we investigate the strong coupling constants among the Xi(+(+))(cc) baryons and pi(0(+/-)) mesons by means of light cone QCD sum rule. Using the general forms of the interpolating currents of the Xi(+(+))(cc) baryons and the distribution amplitudes (DAs) of then meson, we extract the values of the coupling constants g Xi(cc)Xi(cc)pi. We extend our analyses to calculate the strong coupling constants among the partner baryons with pi mesons, as well, and extract the values of the strong couplings g Xi(bb)Xi(bb)pi, and g Xi(bc)Xi(bc)pi. The results of this study may help experimental groups in the analyses of the data related to the strong coupling constants among the hadronic multiplets.