Using b⁰ (6146) and b⁰ (6152) as probes to investigate possible B^*N and D^*N molecules

Heavy quark symmetry can help us identify the internal structure of hadrons and predict new particles. In this study, we examine the strong decay modes of the observed b⁰ (6146) and b⁰ (6152), assuming these two states are molecular states primarily composed of B^*N component. The partial decay widths of the B^*N molecular state into the b and b^* final states through hadronic loops are calculated using effective Lagrangians. Our results, when compared with LHCb observations, support the interpretation of b⁰ (6146) as a molecule primarily composed of B^*N components. However, the decay width of b⁰ (6152) cannot be accurately reproduced within the molecular state framework. Based on the above results and heavy quark symmetry, we predict the existence of B^*N molecular states with Jᵖ=5/2^+, which are the heavy quark spin symmetry partners of b (6146), with masses in the range of 6195-6200 MeV. And the main decay is b^* channel. Moreover, there must existence of a D^*N molecule with Jᵖ=3/2^+, possible corresponding to the experimentally observed c (2860) ^+. If c (2880) ^+ is indeed the heavy quark flavor symmetry partner of b (6152), it would exhibit a conventional three-quark structure. Therefore, we also propose the search for a D^*N molecule with a spin-parity of Jᵖ=5/2^+, which would be the heavy-quark spin partner state of c (2860) ^+. It should be noted that these baryons may be mixed states, containing both molecular and three-quark components. These results can aid experiments in exploring the internal structure of these baryons.