Charmed baryon weak decays with SU(3) flavor symmetry

Abstract

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 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 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 $$ \mathrm{\mathcal{B}}\left({\Xi}_c^0\to {\Lambda}^0{\overline{K}}^0,{\Xi}_c^{+}\to {\Xi}^0{\pi}^{+}\right)=\left(8.3\pm 0.9,\ 8.0\pm 4.1\right)\times {10}^{-3}\kern0.5em \mathrm{and}\kern0.5em \mathrm{\mathcal{B}}\left({\Lambda}_c^{+}\to {\Delta}^{++}{\pi}^{-},{\Xi}_c^0\to {\Omega}^{-}{K}^{+}\right)=\left(5.5\pm 1.3,\kern0.5em 4.8\pm 0.5\right)\times {10}^{-3} $$. 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+ $$ {\Omega}_{cc}^{+}\to {\Xi}_c^{+}{\overline{K}}^0,{\Xi}_{cc}^{++}\to \left({\Xi}_c^{+}{\pi}^{+},{\varSigma}_c^{++}{\overline{K}}^0\right),\kern0.5em \mathrm{and}\kern0.5em {\Omega}_{ccc}^{++}\to \left({\Xi}_{cc}^{++}{\overline{K}}^0,{\Omega}_{cc}^{+}{\pi}^{+},{\Xi}_c^{+}{D}^{+}\right) $$ are the favored Cabibbo-allowed decays, which are accessible to the BESIII and LHCb experiments.

Keywords

• Global Symmetries
• Heavy Quark Physics