Branching fractions, polarisation and asymmetries of B→VV decays
By Martin Beneke, J. Rohrer, Deshan Yang. 2006
229 citations recorded by the source corpus.
Abstract We calculate the hard-scattering kernels relevant to the negative-helicity decay amplitude in B decays to two vector mesons in the framework of QCD factorisation. We then perform a comprehensive analysis of the 34 B → V V decays, including B s decays and the complete set of polarisation observables. We find considerable uncertainties from weak annihilation and the non-factorisation of spectator-scattering. Large longitudinal polarisation is expected with certainty only for a few tree-dominated colour-allowed modes, which receive small penguin and spectator-scattering contributions. This allows for an accurate determination of the CKM angle α (or γ) from S L ρ ρ resulting in α = ( 85.6 −7.3 +7.4 ) ° . We also emphasize that the ρ K ∗ system is ideal for an investigation of electroweak penguin effects.
Subfields: Condensed Matter Physics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/6b28b07bbdaae582108563a9498875feb2f7abd0
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In Condensed Matter Physics
In Nuclear and High Energy Physics
Citations in the corpus
- On B → Vℓℓ at small dilepton invariant mass, power corrections, and new physics (2012, methodology): “In case of the decays under study, we have [107]”
- Study of the B0 → ρ(770)°K*(892)0 decay with an amplitude analysis of B0 → (π+π−)(K+π−) decays (2018, unknown): “These are in good agreement with theoretical predictions computed in both QCDF and pQCD frameworks.”