SU(3) symmetry and its breaking effects in semileptonic heavy baryon decays

We employ the flavor SU(3) symmetry to analyze semileptonic decays of anti-triplet charmed baryons ($\Lambda^{+}_{c},\Xi_{c}^{+,0}$) and find that experimental data on ${\cal B}(\Lambda_c\to\Lambda \ell^+\nu_{\ell})$ implies $\mathcal{B}(\Xi_c^0\to\Xi^-e^+\nu_{e})=(4.10\pm0.46)\%$ $\mathcal{B}(\Xi_c^0\to\Xi^-\mu^+\nu_{\mu})= (3.98\pm0.57)\%$. When this prediction is confronted with recent results from Belle collaboration $\mathcal{B}(\Xi_c^0\to\Xi^-e^+\nu_e)=1.31(04\pm07\pm38)\%$ $\mathcal{B}(\Xi_c^0\to\Xi^-\mu^+\nu_{\mu})=1.27(06\pm10\pm 37)\%$, it found severely broken. then consider generic breaking effects in these can be accommodated different scenarios but are inevitably large. In some interesting scenarios, we also explore testable implications which tested more become available. Similar analyses carried out for beauty baryon octet baryons. The validity examined when