Short study of the eta-eta' system in the two mixing angle scheme
Escribano, Rafel (Universitat Autònoma de Barcelona. Departament de Física)
Institut de Física d'Altes Energies

Additional title:	The eta-eta' system in the two mixing angle scheme
Date:	2007
Abstract:	A two mixing angle description of the pseudoscalar decay constants associated to the η-η'system is used to parametrize the theoretical amplitudes of the radiative decays (η,η') → γγ and the coupling constants gV(η,η')γ with V = ρ,ω,φ. 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.
Grants:	Ministerio de Ciencia y Tecnología FPA2002-00748EU
Note:	Contribution to the proceedings of the International Europhysics Conference on High Energy Physics (HEP2005), Lisboa, Portugal, 21-27 July 2005
Note:	Altres ajuts: work partially suportted by EU, HPRN-CT-2002-00311, EURIDICE network
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra, i la creació d'obres derivades, sempre que no sigui amb finalitats comercials i que es distribueixin sota la mateixa llicència que regula l'obra original. Cal que es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Hep-ph
Published in:	Proceedings of Science, Vol. HEP2005 (2007), art. 418, ISSN 1824-8039

Adreça alternativa: https://arxiv.org/abs/hep-ph/0512021v1
DOI: 10.22323/1.021.0418

4 p, 358.2 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Física d’Altes Energies (IFAE)
Articles > Research articles
Articles > Published articles