Description of the newly observed Ξc0 states as molecular states.

Very recently, three new structures Ξ c (2923) 0 , Ξ c (2938) 0 , and Ξ c (2964) 0 at the invariant mass spectrum of Λ c + K - observed by the LHCb Collaboration trigger a hot discussion about their inner structure. In this work, we study the strong decay mode of the newly observed Ξ c 0 assuming that the Ξ c 0 is a D ¯ Λ - D ¯ Σ molecular state. With the possible quantum numbers J p = 1 / 2 ± and 3 / 2 ± , the partial decay widths of the D ¯ Λ - D ¯ Σ molecular state into the Λ c + K - , Σ c + K - ,and Ξ c + π - final states through hadronic loop are calculated with the help of the effective Lagrangians. By comparison with the LHCb observation, the current results of total decay width support the Ξ c (2923) 0 as D ¯ Λ - D ¯ Σ molecule while the decay width of the Ξ c (2938) 0 and Ξ c (2964) 0 can not be well reproduced in the molecular state picture. In addition, the calculated partial decay widths with S wave D ¯ Λ - D ¯ Σ molecular state picture indicate that allowed decay mode, Ξ c + π - , may have the biggest branching ratio for the Ξ c (2923) 0 . The experimental measurements for this strong decay process could be a crucial test for the molecule interpretation of the Ξ c (2923) 0 . [ABSTRACT FROM AUTHOR]