Radiative Decays, Nonet Symmetry and SU(3) Breaking

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dc.creatorBenayoun, M.
dc.creatorDelBuono, L.
dc.creatorEidelman, S.
dc.creatorIvanchenko, V. N.
dc.creatorO'Connell, H. B.
dc.date1999-02-11
dc.date1999-05-12
dc.date.accessioned2026-07-07T11:09:51Z
dc.date.available2026-07-07T11:09:51Z
dc.descriptionWe re-examine the problem of simultaneously describing in a consistent way all radiative and leptonic decays of light mesons (V -> P gamma, P -> V gamma, P -> gamma gamma, V -> e^+ e^-). 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^{*+/-} 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 theta_P ~ -11^o and a value for theta_V which is ~ 3^o 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 eta', using only light meson decays.
dc.description36 pages. Published version
dc.identifierhttps://arxiv.org/abs/hep-ph/9902326
dc.identifierhttp://arxiv.org/abs/hep-ph/9902326
dc.identifierPhys.Rev.D59:114027,1999
dc.identifierdoi:10.1103/PhysRevD.59.114027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190612
dc.subjectHigh Energy Physics - Phenomenology
dc.titleRadiative Decays, Nonet Symmetry and SU(3) Breaking
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