The masses and decay widths of the S-wave Λ_cΛ̅_c bound states
arxiv(2024)
摘要
In this work, we investigate possible bound states of the
Λ_cΛ̅_c system in the Bethe-Salpeter formalism in the ladder
and instantaneous approximations. By numerically solving the Bethe-Salpeter
equation, we confirm the existence of Λ_cΛ̅_c bound states
with quantum numbers J^PC=0^-+ and J^PC=1^–. We further
investigate the partial decay widths of the Λ_cΛ̅_c bound
states into NN̅, DD̅, DD̅^∗, D^∗D̅^∗,
ππ̅, and KK̅. Our results indicate that the decay width of
the Λ_cΛ̅_c bound state with J^PC=1^– is much larger
than that with J^PC=0^-+, and among their decay channels, the
DD̅^∗ final state is the main decay mode. We suggest experiments to
search for the Λ_cΛ̅_c bound states in the DD̅^∗
final state.
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