Radiative phi-meson decays and eta-eta ' mixing: a QCD sum rule analysis

Authors
De Fazio, F Pennington, MR
Citation
F. De Fazio et Mr. Pennington, Radiative phi-meson decays and eta-eta ' mixing: a QCD sum rule analysis, J HIGH EN P, 2000(7), 2000, pp. NIL_1160-NIL_1177
Citations number
38
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
10298479 → ACNP
Volume
2000
Issue
7
Year of publication
2000
Pages
NIL_1160 - NIL_1177
Database
ISI
SICI code
1029-8479(200007)2000:7<NIL_1160:RPDAE'>2.0.ZU;2-V
Abstract
The radiative transitions phi --> eta gamma and phi --> eta'gamma are analy sed using QCD sum-rules. At leading order in perturbative QCD, we obtain th e results: B (phi --> eta gamma) = (1.15 +/- 0.2) 10(-2) and B (phi --> eta 'gamma) = (1.18 +/- 0.4) 10(-4), in very good agreement with existing exper imental data. The related issue of eta-eta' mixing is discussed and we give predictions for the eta and eta' decay constants in the framework of a mix ing scheme in the quark-flavour basis.