π0-η-η′ mixing from V → Pγ and P → Vγ decays

π0-η-η′ mixing from V → Pγ and P → Vγ decays

An enhanced phenomenological model that includes isospin-symmetry breaking is presented in this letter. The model is then used in a number of statistical fits to the most recent experimental data for the radiative transitions VPγ (V=ρ, K⁎, ω, ϕ and P=π, K, η, η′) and estimations for the mixing angle...

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Bibliographic Details
Published in:Physics letters. B Vol. 807; p. 135534
Main Authors: Escribano, Rafel, Royo, Emilio
Format: Journal Article
Language:English
Published: Elsevier B.V 01-08-2020
Elsevier
Subjects:
[formula omitted] anomaly
Flavour symmetry
Isospin symmetry
Mixing angles
Radiative decays
UA anomaly
Radiative decays
Flavour symmetry
UA anomaly
Mixing angles
Isospin symmetry
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Summary:An enhanced phenomenological model that includes isospin-symmetry breaking is presented in this letter. The model is then used in a number of statistical fits to the most recent experimental data for the radiative transitions VPγ (V=ρ, K⁎, ω, ϕ and P=π, K, η, η′) and estimations for the mixing angles amongst the three pseudoscalar states with vanishing third-component of isospin are obtained. The quality of the performed fits is good, e.g. χmin2/d.o.f=1.9. The current experimental uncertainties allow for isospin-symmetry violations with a confidence level of approximately 2.5σ.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2020.135534