Glue content and mixing angle of the eta - eta' system. The effect of the isoscalar 0- continuum

Details Glue content and mixing angle of the eta - eta' system. The effect of the isoscalar 0- continuum Glue content and mixing angle of the eta - eta' system. The effect of the isoscalar 0- continuum

2004-10-18

arxiv.org/abs/hep-ph/0410240v1

Phys.Rev. D70 (2004) 116001; Erratum-ibid. D72 (2005) 019903

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.70.116001

Masses and topological charges of the eta and eta' mesons are expressed in terms of the singlet-octet mixing angle theta. Contributions of the pseudoscalar 0- continuum are evaluated in a model independant way. Applications to the decay eta --> 3pi and to the radiative decay of vector mesons involving eta and eta' are considered. Agreement with experiment is in general good and the results quite stable for -30.5 <= theta <= -18.5

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