An analysis on doubly bottom molecular tetraquarks composed of $H_{(s)}$ and $T_{(s)}$ doublets

Abstract

In this work, we investigate the doubly bottom $H_{(s)}{\bar{T}}_{(s)}$ and $H_{(s)}{T}_{(s)}$ systems by adopting the one-boson-exchange model, where $H_{(s)}$ and $T_{(s)}$ represent $S$-wave $B_{(s)}^{(\ast )}$ and $P$-wave $B_{(s)1,2}^{(\ast )}$ doublets, respectively. For the $H\bar{T}$ systems, we predict some loosely bound states in the $I(J^{PC})=0(1^{-\pm })$ $B{\bar{B}}_1$, $I(J^{PC})=0(2^{-\pm })$ $B{\bar{B}}_2^{\ast }$, $I(J^{PC})=0(1^{-\pm })$ $B^{\ast }{\bar{B}}_1$ and $I(J^{PC})=0(2^{-\pm })$ $B^{\ast }{\bar{B}}_2^{\ast }$ channels, which are the most promising hidden bottom molecular tetraquarks. For the $HT$ systems, the $B^{\ast }{B}_1$ channels with quantum numbers $I(J^P)=0(1^{-}),0(2^{-})$ and the $B^{\ast }{B}_2^{\ast }$ channels with $I(J^P)=0(2^{-})$ are also likely candidates for forming molecular tetraquarks. In contrast, no molecular candidates have been identified in the bottom-strange sectors. One can hope that our predictions will provide valuable insights to the LHCb and Belle II Collaborations as they continue to explore this fascinating field through experimental research.

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