Evaluation of CKM matrix elements from exclusive Pℓ4 decays

Choong Sun Kim, G. López Castro, S. L. Tostado

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number073003
JournalPhysical Review D
Volume95
Issue number7
DOIs
Publication statusPublished - 2017 Apr 1

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evaluation
decay
matrices
poles
vector mesons
quarks

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Kim, Choong Sun ; López Castro, G. ; Tostado, S. L. / Evaluation of CKM matrix elements from exclusive Pℓ4 decays. In: Physical Review D. 2017 ; Vol. 95, No. 7.
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Evaluation of CKM matrix elements from exclusive Pℓ4 decays. / Kim, Choong Sun; López Castro, G.; Tostado, S. L.

In: Physical Review D, Vol. 95, No. 7, 073003, 01.04.2017.

Research output: Contribution to journalArticle

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