摘要
We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where the charmed baryons can be B c = (Ξ c 0 , Ξ c + , Λ c + ), B c ′ = (Σ c (++,+,0) , Ξ c ′ (+,0) , Ω c 0 ), B cc = (Ξ cc + + , Ξ cc + , Ω c + ) or B cc = Ω ccc + + . With B n (′) denoted as the baryon octet (decuplet), we find that the B c → B n ′ ℓ + ν ℓ decays are forbidden, while the Ω c 0 → Ω − ℓ + ν ℓ , Ω cc + → Ω c 0 ℓ + ν ℓ , and Ω ccc + + → Ω cc + ℓ + ν ℓ decays are the only existing Cabibbo- allowed modes for B c ′ → B n ′ ℓ + ν ℓ , B cc → B c ′ ℓ + ν ℓ , and B ccc → B cc (′) ℓ + ν ℓ , respectively. We predict the rarely studied B c → B n (′) M decays, such as ℬ(Ξc0→Λ0K¯0,Ξc+→Ξ0π+)=(8.3±0.9,8.0±4.1)×10−3andℬ(Λc+→Δ++π−,Ξc0K+)=(5.5±1.3,4.8±0.5)×10−3. For the observation, the doubly and triply charmed baryon decays of Ωcc+→Ξc+K¯0,Ξcc++→(Ξc+π+,Σc++K¯0),andΩccc++→(Ξcc++K¯0,Ωcc+π+,Ξc+D+) are the favored Cabibbo-allowed decays, which are accessible to the BESIII and LHCb experiments.