Combined exclusive |V_ub| and |V_cb| for End of 2023 Averages Report

LHCb published a measurement of |V_ub/V_cb|= from the partial rate for Λ_b→pμν normalized to Λ_b→Λ_cμν, [arXiv:1504.01568].
The published value, |V_ub/V_cb|=0.082±0.004_exp.±0.004_th. updated to the PDG2022 average for the Branching Fraction BF(Λ_c→p K π)=(6.26 ± 0.29)%, is

|V_ub/V_cb|=0.079±0.003_exp.±0.004_th.

LHCb published a measurement of B_s→K μν normalized to B_s→D_s μν decays. The measurement has been performed in two bins of q². The resul, using recent Lattice calculation for q² > 7 GeV² is

|V_ub/V_cb|=0.0860±0.0038_exp.±0.0037_th.

The combination gives |V_ub/V_cb|=0.0823±0.0035_tot

The average of the |V_cb| obtained from B→D l;ν, B→D^*lν½ and B_s→ D_s^(*)μμ, is |V_cb|=39.62±0.47_tot x 10^-3.

The result of a combined fit using as input only the exclusive |V_ub| and |V_cb| measurements, with the |V_ub/V_cb| measurements from LHCb gives the following results

|V_ub|=(3.43 ±0.12)x10^-3
|V_cb|=(39.77 ±0.46)x10^-3

the correlation is ρ=0.239, with a fit P(χ²)=4.8%. In this combination the uncertainties are considered uncorrelated.
The result of the fit is shown here .pdf,