1999/02/28 by M. Benayoun, L. DelBuono, S. Eidelman +4 · 5 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.59.114027
published as Phys.Rev.D59:114027,1999 · 36 pages. Published version
openalex publication_date 1999/05/11 · arxiv created 1999/05/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We reexamine the problem of simultaneously describing in a consistent way all radiative and leptonic decays of light mesons (\stackrel\ensuremath→VP\ensuremathγ, \stackrel\ensuremath→PV\ensuremathγ, \stackrel\ensuremath→P\ensuremathγ\ensuremathγ, \stackrel\ensuremath→Ve+e^\ensuremath-). For this purpose, we rely on the hidden local symmetry model in both its anomalous and non-anomalous sectors. We show that the SU(3) symmetry breaking scheme proposed by Bando, Kugo and Yamawaki, supplemented with nonet symmetry breaking in the pseudoscalar sector, allows one to reach a nice agreement with all data, except for the K^*\ifmmode±\else\textpm\fi radiative decay. An extension of this breaking pattern allows one to account for this particular decay mode too. Considered together, the whole set of radiative decays provides a pseudoscalar mixing angle \ensuremathθP\ensuremath≃\ensuremath-11\ifmmode^∘\else\textdegree\fi and a value for \ensuremathθV which is \ensuremath≃3\ifmmode^∘\else\textdegree\fi from that of ideal mixing. We also show that it is impossible, in a practical sense, to disentangle the effects of nonet symmetry breaking and those of glue inside the \ensuremathη^\ensuremath', using only light meson decays.