Determinations of $$|V_{cb}|$$ | V c b | and $$|V_{ub}|$$ | V u b | from baryonic $$\Lambda _b$$ Λ b decays

Abstract

We present the first attempt to extract |V cb | from the b → + c ν decay without relying on |V ub | inputs from the B meson decays. Meanwhile, themeasured with high precisions are involved in the extraction. Explicitly, we find that |V cb | = (44.6 ± 3.2) × 10 −3 , agreeing with the value of (42.11 ± 0.74) × 10 −3 from the inclusive B → X c ν decays. Furthermore, based on the most recent ratio of |V ub |/|V cb | from the exclusive modes, we obtain |V ub | = (4.3 ± 0.4) × 10 −3 , which is close to the value of (4.49±0.24)×10 −3 from the inclusive B → X u ν decays. We conclude that our determinations of |V cb | and |V ub | favor the corresponding inclusive extractions in the B decays.

Semileptonic baryonic B decays

“…Since the V ub in Eq. ( 3) is for the exclusive baryonic B (s) decays, which can be different from that in the inclusive ones [40][41][42], we choose |V ub | ex = (3.43 ± 0.32) × 10 −3 determined from the B0 s and baryonic b decays [7] as our experimental input in Eq. (17).…”

New $X_{0,1}(2900)$-like exotic states in $b$-baryon decays

“…s in the generalized factorization [20][21][22]. From B(Σ c → Λ c π) ≃ 100% [18], we determine g c = 19.1.…”

Charmed $Ω_c$ weak decays into $Ω$ in the light-front quark model

“…where G F is the Fermi constant, V ij the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements, c 1,2 the effective Wilson coefficients, (q 1 q 2 ) ≡ q1 γ µ (1 − γ 5 )q 2 and (ū ν v ℓ ) ≡ ūν γ µ (1 − γ 5 )v ℓ . In terms of H H,L , we derive the amplitudes of Ω 0 c → Ω − π + (ρ + ) and Ω 0 c → Ω − ℓ + ν ℓ as [44,45]…”