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Abstract:We study the semileptonic and non-leptonic charmed baryon decays with SU(3) flavor symmetry, where the charmed baryons can be B c = (n denoted as the baryon octet (decuplet), we find that the B c → B ′ n ℓ + ν ℓ decays are forbidden, while theand Ω ++ ccc → Ω + cc ℓ + ν ℓ decays are the only existing Cabibboallowed 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.3, 4.8±0.5)×10 −3 . For the observation, the doubly and triply charmed baryon decays ofare the favored Cabibboallowed decays, which are accessible to the BESIII and LHCb experiments.

We explore the breaking effects of the SU (3) flavor symmetry in the singly Cabibbo-suppressed antitriplet charmed baryon decays of B c → B n M, with B c = ( 0 c , + c , + c ) and B n (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 B(In addition, we obtain that, which all receive significant contributions from the breaking effects, and can be tested by the BESIII and LHCb experiments.

We analyze the decay processes of B c → B n M with the SU (3) F flavor symmetry and spindependent amplitudes, where B c (B n ) and M are the anti-triplet charmed (octet) baryon and nonet meson states, respectively. In the SU (3) F approach, it is the first time that the decay rates and up-down asymmetries are fully and systematically studied without neglecting the O (15)

We study the semileptonic decays B c → B n ℓ + ν ℓ where B c(n) is the anti-triplet-charmed (octet) baryon with the SU (3) f flavor symmetry and helicity formalism. In particular, we present the decay branching ratios of B c → B n ℓ + ν ℓ in three scenarios: (a) an exact SU (3) f symmetry with equal masses for the anti-triplet-charmed (octet) baryon states of B c (B n ), (b) SU (3) f parameters without the baryonic momentum-transfer dependence, and (c) SU (3) f with baryonic transition form factors in the heavy quark limit. We show that our results are all consistent with the existing data. Explicitly, we predict that B(Ξ + c → Ξ 0 e + ν e ) = (11.9 ± 1.3, 9.8 ± 1.1, 10.7 ± 0.9) × 10 −2 and B(Ξ 0 c → Ξ − e + ν e ) = (3.0 ± 0.3, 2.4 ± 0.3, 2.7 ± 0.2) × 10 −2 in the scenarios (a), (b) and (c) agree with the data of (14.0 +8.3 −8.7 ) × 10 −2 and (5.6 ± 2.6) × 10 −2 from the CLEO Collaboration, respectively. In addition, we obtain that B(Λ + c → ne + ν e ) = (2.8 ± 0.4, 4.9 ± 0.4, 5.1 ± 0.4) × 10 −3 in (a), (b) and (c).We also examine the longitudinal asymmetry parameters of α(B c → B n ℓ + ν ℓ ), which are sensitive to the different scenarios with SU (3) f . Some of the decay branching ratios and asymmetries can be observed by the ongoing experiments at BESIII and LHCb as well as the future searches by BELLEII.