Possible assignments of highly excited Λc(2860)+, Λc(2880)+ and Λc(2940)

Possible assignments of highly excited Λ c ( 2860 ) + , Λ c ( 2880 ) + and Λ c ( 2940 ) + are explored in a 3 P 0 strong decay model. Decay widths, branching fraction ratios R = Γ ( Σ c ( 2520 ) π ) Γ ( Σ c ( 2455 ) π ) and the branching fractions of DN channels of theses assignments are computed. D 0 p channel is a very important channel to provide information on the inner excitation and structure of these highly excited Λ c . In our analysis, Λ c ( 2860 ) + may be a 1 D -wave excited Λ c with J P = 3 2 + , which has dominant DN decay channels with a branching fraction B ( Λ c ( 2860 ) + → D N ) = 75 % and a branching ratio R = Γ ( Σ c ( 2520 ) π ) Γ ( Σ c ( 2455 ) π ) = 0.12 . Λ c ( 2880 ) + is very possibly a 1 F -wave excited Λ c with J P = 5 2 - ; In this assignment, the predicted total decay width ( Γ ≈ 4.49 MeV) is comparable to the measured Γ = 5 . 6 - 0.6 + 0.8 MeV, and the predicted R = Γ ( Σ c ( 2520 ) π ) Γ ( Σ c ( 2455 ) π ) = 0.12 is consistent with the measured R = 0.225 ± 0.062 ± 0.025 ; The DN channels are its dominant strong decay channels with a branching fraction B ( Λ c ( 2880 ) + → D N ) = 94 % . Λ c ( 2880 ) + seems impossibly a 1 D -wave excited Λ c with J P = 5 2 + once the presently measured R = Γ ( Σ c ( 2520 ) π ) Γ ( Σ c ( 2455 ) π ) is confirmed. Λ c ( 2940 ) + may be a 2 P -wave excited Λ c 1 , 1 1 , 0 ( 3 2 - , 2 P ) . In this case, Λ c ( 2940 ) + has a total decay width Γ = 17.56 MeV, a branching ratio R = Γ ( Σ c ( 2520 ) π ) Γ ( Σ c ( 2455 ) π ) = 0.89 and the DN decay channels with a branching fraction B ( Λ c ( 2940 ) + → D N ) = 43 % . In order to understand the inner excitation and structure of these highly excited Λ c , measurements of those predicted quantities are required in the future.