Antitriplet charmed baryon decays with SU(3) flavor symmetry

摘要

We study the decays of the antitriplet charmed baryon state (Ξ_c~0 ; Ξ_c~+ ;Λ_c~+ ) based on the SU(3) flavor symmetry. In particular, after predicting B(Ξ_c~0 →Ξ~-π~+)=(15.7±0.7)×10~(-3) and B(Ξ_c~+ →Ξ~-π~+π~+)= (14.7±8.4)×10~(-3),we extract that B(Ξ_c~0 →ΛK~-π~+;ΛK~+K~-;Ξ-e+ν_e)=(16.8±2.3;0.45±0.11;48.7±17.4)× 10~(-3) and B(Ξ_c~+ →pK_s~0 K_s~0 ;Σ~+K~-π~+;Ξ~0π~+π~0;Ξ~0e+ν_e)=(1.3±0.8;13.8±8.0;33.8±21.9;33.8 _(-22.6)~(+21.9) )×10~(-3). We also find thatB(Ξ_c~0 →Ξ~0η;Ξ~0η')=(1.7 _(-1.7)~(+1.0) ;8.6 _(-6.3)~(+11.0) )×10~(-3),B(Ξ_c~0 → Λ~0η;Λ~0η') = (1.6 _(-0.8)~(+1.2) ; 9.4 _(-6.8)~(+11.6) ) × 10~(-4) and B(Ξ_c~+ → Σ~+η; Σ~+η') = (28.4 _(-6.9)~(+8.2) ; 13.2 _(-11.9)~(+24.0) ) × 10~(-4). These Ξ_c decays with the branching ratios of O(10~(-4)-10~(-3)) are clearly promising to be observed by the BESIII and LHCb experiments.