文章基本信息

标题：The eta-eta' system in the two mixing angle scheme
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作者：R. Escribano
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2005
卷号：2005
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：A two mixing angle description of the pseudoscalar decay constants associated to the h-h0 system is used to parametrize the theoretical amplitudes of the radiative decays (h,h0) ! gg and the coupling constants gV(h,h0)g with V = r,w,f. The parametrization is performed in both the “octet-singlet” basis and the “quark-flavour” basis. An excellent agreement with the most recent experimental data is achieved. Our analysis reveals that at the present experimental accuracy the two mixing angles differ significantly in the former basis but not in the latter, in accordance with the expectations of large Nc Chiral Perturbation Theory where the difference between the two mixing angles are due to a SU(3) f -breaking effect and a violation of the OZI rule respectively.