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(pm )} 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 the pi 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.
Highlights
The search for doubly heavy baryons and determination of their properties constitute one of the main directions of the research in the experimental and theoretical high energy physics
), the investigation of the doubly charmed/bottom baryons from many aspects is of great importance that may help us get valuable knowledge on the nature of the newly discovered states, and in the search for other members of the doubly heavy baryons predicted by the quark model
With a data sample corresponding to an integrated luminosity of 9 fb−1 at the centre-of-mass energies of 7, 8 and 13 TeV, the LHCb Collaboration published the results of a search for the doubly charmed baryon
Summary
The search for doubly heavy baryons and determination of their properties constitute one of the main directions of the research in the experimental and theoretical high energy physics. The mass measured by SELEX, averaged over the two decay modes, was found to be 3518.7±1.7 MeV/c2. This has not been confirmed by any other experiments so far. With a data sample corresponding to an integrated luminosity of 9 fb−1 at the centre-of-mass energies of 7, 8 and 13 TeV, the LHCb Collaboration published the results of a search for the doubly charmed baryon [9]. Most researches are focused on the mass and weak decays of the doubly heavy baryons and the number of studies dedicated to their strong decays and the strong couplings of these baryons with other hadrons is very limited.
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