Charmless B_(s)→ VV B ( s ) → V V decays in factorization-assisted topological-amplitude approach

2017/01/05 by Chao Wang, Qi-An Zhang, Ying Li +2 · 1 citation
Chemistry · Mathematics · Physics and Astronomy · #Algorithm #Amplitude #Annihilation #Black Holes and Theoretical Physics #Branching fraction #Chemistry #Combinatorics #Factorization #Mathematics #Meson #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Topology (electrical circuits) #Vector meson #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-017-4889-3

published as Eur.Phys.J. C77 (2017) no.5, 333 · 22 pages, 2 figures

arxiv created 2017/01/05 · openalex created_date 2017/02/24 · openalex publication_date 2017/05/01 · arxiv updated 2017/06/01 · openalex updated_date 2026/08/05

Abstract

Within the factorization-assisted topological-amplitude approach, we studied the 33 charmless B_(s) → VV decays, where V stands for a light vector meson. According to the flavor flows, the amplitude of each process can be decomposed into eight different topologies. In contrast to the conventional flavor diagrammatic approach, we further factorize each topological amplitude into decay constant, form factors and unknown universal parameters. By χ ² fitting 46 experimental observables, we extracted 10 theoretical parameters with χ ² per degree of freedom around 2. Using the fitted parameters, we calculated the branching fractions, polarization fractions, CP asymmetries and relative phases between polarization amplitudes of each decay mode. The decay channels dominated by tree diagram have large branching fractions and large longitudinal polarization fraction. The branching fractions and longitudinal polarization fractions of color-suppressed decays become smaller. Current experimental data of large transverse polarization fractions in the penguin dominant decay channels can be explained by only one transverse amplitude of penguin annihilation diagram. Our predictions of the not yet measured channels can be tested in the ongoing LHCb experiment and the Belle-II experiment in the future.

Citations

• CharmlessB→PV,VVdecays and new physics effects in the minimal supergravity model
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