SU(3) symmetry breaking in charmed baryon decays

Abstract

We explore the breaking effects of the SU(3) flavor symmetry in the singly Cabibbo-suppressed anti-triplet charmed baryon decays of Bc→ BnM, with Bc=(Ξc0,Ξc+,Λc+) and Bn(M) the baryon (pseudo-scalar) octets. We find that these breaking effects can be used to account for the experimental data on the decay branching ratios of B(Λc+→Σ0K+,Λ0K+) and RK/π′=B(Ξc0→Ξ-K+)/B(Ξc0→Ξ-π+). In addition, we obtain that B(Ξc0→Ξ-K+,Σ-π+)=(4.6±1.7,12.8±3.1)×10-4, B(Ξc0→pK-,Σ+π-)=(3.0±1.0,5.2±1.6)×10-4 and B(Ξc+→Σ0(+)π+(0))=(10.3±1.7)×10-4, which all receive significant contributions from the breaking effects, and can be tested by the BESIII and LHCb experiments.