SU(3) symmetry breaking in charmed baryon decays

Abstract

Abstract We explore the breaking effects of the SU(3) flavor symmetry in the singly Cabibbo-suppressed anti-triplet charmed baryon decays of $$\mathbf{B}_c\rightarrow \mathbf{B}_n M$$ Bc→BnM , with $$\mathbf{B}_c=(\Xi _c^0,\Xi _c^+,\Lambda _c^+)$$ Bc=(Ξc0,Ξc+,Λc+) and $$\mathbf{B}_n(M)$$ 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 $${\mathcal {B}}(\Lambda _c^+\rightarrow \Sigma ^{0} K^{+},\Lambda ^{0} K^{+})$$ B(Λc+→Σ0K+,Λ0K+) and $$R'_{K/\pi }={\mathcal {B}}(\Xi ^0_c \rightarrow \Xi ^- K^+)$$ RK/π′=B(Ξc0→Ξ-K+) /$${\mathcal {B}}(\Xi ^0_c \rightarrow \Xi ^- \pi ^+)$$ B(Ξc0→Ξ-π+) . In addition, we obtain that $${\mathcal {B}}(\Xi _{c}^{0} \rightarrow \Xi ^{-} K^{+},\Sigma ^{-} \pi ^{+})=(4.6 \pm 1.7,12.8 \pm 3.1)\times 10^{-4}$$ B(Ξc0→Ξ-K+,Σ-π+)=(4.6±1.7,12.8±3.1)×10-4 , $${\mathcal {B}}(\Xi _c^0\rightarrow pK^-,\Sigma ^+\pi ^-)=(3.0 \pm 1.0, 5.2 \pm 1.6)\times 10^{-4}$$ B(Ξc0→pK-,Σ+π-)=(3.0±1.0,5.2±1.6)×10-4 and $${\mathcal {B}}(\Xi _c^+\rightarrow \Sigma ^{0(+)} \pi ^{+(0)})=(10.3 \pm 1.7)\times 10^{-4}$$ 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.