作者
Fabio Ambrosino, A Antonelli, M Antonelli, F Archilli, P Beltrame, G Bencivenni, S Bertolucci, Cesare Bini, C Bloise, Simona Bocchetta, F Bossi, Paolo Branchini, G Capon, T Capussela, Filippo Ceradini, P Ciambrone, E De Lucia, Antonio De Santis, P De Simone, G De Zorzi, A Denig, Antonio Di Domenico, C Di Donato, Biagio Di Micco, M Dreucci, G Felici, Salvatore Fiore, P Franzini, C Gatti, Paolo Gauzzi, S Giovannella, Enrico Graziani, M Jacewicz, G Lanfranchi, J Lee-Franzini, M Martini, P Massarotti, S Meola, S Miscetti, M Moulson, S Müller, F Murtas, M Napolitano, Federico Nguyen, M Palutan, E Pasqualucci, Antonio Passeri, Vincenzo Patera, P Santangelo, B Sciascia, T Spadaro, M Testa, Ludovico Tortora, P Valente, G Venanzoni, R Versaci, G Xu, KLOE collaboration
发表日期
2009/7/31
期刊
Journal of High Energy Physics
卷号
2009
期号
07
页码范围
105
出版商
IOP Publishing
简介
We update the values of the η-η'mixing angle and of the η'gluonium content by fitting our measurement R ϕ= BR (ϕ→ η'γ)/BR (ϕ→ ηγ) together with several vector meson radiative decays to pseudoscalars (V→ Pγ), pseudoscalar mesons radiative decays to vectors (P→ Vγ) and the η'→ γγ, π 0→ γγ widths. From the fit we extract a gluonium fraction of Z G 2= 0.12±0.04, the pseudoscalar mixing angle ψ P=(40.4±0.6) and the ϕ− ω mixing angle ψ V=(3.32±0.09). Z G 2 and ψ P are fairly consistent with those previously published. We also evaluate the impact on the η'gluonium content determination of future experimental improvements of the η'branching ratios and decay width.
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F Ambrosino, A Antonelli, M Antonelli, F Archilli… - Journal of High Energy Physics, 2009