We consider the exclusive Pℓ4 decays, P→(P1P2)Vℓνℓ, where the subindex V means that the invariant mass of the pseudoscalar pair is taken within a small window around the mass of the vector meson V. Pole contributions beyond the dominant P→V(→P1P2)ℓνℓ amplitude of Pℓ4 decays are identified, which, in turn, affect the determination of the CKM matrix elements |Vqq′|. We evaluate the effects of those contributions in the extraction of bottom and charm quark mixings. An application to B→(ππ)ρℓνℓ data from the Belle Collaboration shows an increase in the extracted value of |Vub| in better agreement with determinations based on B→πℓνℓ decays. The effect of the ρ and D∗ pole contributions in the determination of |Vcd| from the decay D→ππℓ-νℓ has also been investigated.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)