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In present work, we perform a coupled-channel analysis of B^ (*) (ₒ) B^ (*) (ₒ) systems with the one-boson-exchange potentials. We first study the I (J^PC) =1 (1^+-) BB^*/B^*B^* system to describe the Z₁ (10610) and Z₁ (10650) particles as molecular states and determine the reasonable range of cutoff parameter. Then, other B^ (*) (ₒ) B^ (*) (ₒ) combinations with different quantum numbers are systematically investigated. Some bound states and resonances appear in the isoscalar systems, while only several shallow bound states exist for isovector systems. Far away from the excited conventional P-wave bottomium, these predicted states can be easily identified as exotic particles both theoretically and experimentally. Moreover, the b (nS) / (nS) plus light mesons are the excellent final states to search for the bound states, while the B B^*+h. c. and B^* B^* channels are suitable for the resonances. We highly recommend that the LHCb and Belle II Collaborations can hunt for these bottomonium-like states in future.
Song et al. (Mon,) studied this question.
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