Charmed baryon weak decays with SU(3) flavor symmetry

Abstract

We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where the charmed baryons can be B_c = (Ξ_c⁰, Ξ_c⁺, Λ_c⁺), B_c^′ = (Σ_c^(++,+,0), Ξ_c^′ (+,0), Ω_c⁰), 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_c⁰ → Ω⁻ℓ⁺ν_ℓ, Ω_cc⁺ → Ω_c⁰ℓ⁺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 ℬΞc0→Λ0K¯0,Ξc+→Ξ0π+=8.3±0.9,8.0±4.1×10−3andℬΛc+→Δ++π−,Ξc0→Ω−K+=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.