We update the values of the ?-?? mixing angle and of the ?? gluonium content by ?tting our measurement R? = BR(? ? ? ? ? )/BR(? ? ?? ) together with several vector meson radiative decays to pseudoscalars (V ? P ? ), pseudoscalar mesons radiative decays to vectors (P ? V ? ) and the ?? ? ? ? , ? 0 ? ? ? widths. From the ?t we extract a gluonium fraction of Z 2 G = 0.12 ±0.04, the pseudoscalar mixing angle ?P = (40.4 ±0.6)? and the ? ?? mixing angle ?V = (3.32 ± 0.09)? . Z2G and ?P are fairly consistent with those previously published. We also evaluate the impact on the ?? gluonium content determination of future experimental improvements of the ?? branching ratios and decay width.

A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson / Ambrosino, F; Antonelli, A; Antonelli, M; Archilli, F; Beltrame, P; Bencivenni, G; Bertolucci, S; Bini, Cesare; Bloise, C; Bocchetta, S; Bossi, F; Branchini, P; Capon, G; Capussela, T; Ceradini, F; Ciambrone, P; DE LUCIA, E; DE SANTIS, Antonio; DE SIMONE, P; G., DE ZORZI; Denig, A; DI DOMENICO, Antonio; DI DONATO, C; DI MICCO, B; Dreucci, M; Felici, G; Fiore, Salvatore; Franzini, P; Gatti, C; Gauzzi, Paolo; Giovannella, S; Graziani, E; Jacewicz, M; Lanfranchi, G; LEE FRANZINI, J; Martini, M; Massarotti, P; Meola, S; Miscetti, S; Moulson, M; Muller, S; Murtas, F; Napolitano, M; Nguyen, F; Palutan, M; Pasqualucci, E; Passeri, A; Patera, Vincenzo; Santangelo, P; Sciascia, B; Spadaro, T; Testa, M; Tortora, L; Valente, P; Venanzoni, G; Versaci, R; Xu, G.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - (2009). [10.1088/1126-6708/2009/07/105]

A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson

BINI, Cesare;DE SANTIS, ANTONIO;DI DOMENICO, Antonio;FIORE, SALVATORE;GAUZZI, Paolo;PATERA, Vincenzo;
2009

Abstract

We update the values of the ?-?? mixing angle and of the ?? gluonium content by ?tting our measurement R? = BR(? ? ? ? ? )/BR(? ? ?? ) together with several vector meson radiative decays to pseudoscalars (V ? P ? ), pseudoscalar mesons radiative decays to vectors (P ? V ? ) and the ?? ? ? ? , ? 0 ? ? ? widths. From the ?t we extract a gluonium fraction of Z 2 G = 0.12 ±0.04, the pseudoscalar mixing angle ?P = (40.4 ±0.6)? and the ? ?? mixing angle ?V = (3.32 ± 0.09)? . Z2G and ?P are fairly consistent with those previously published. We also evaluate the impact on the ?? gluonium content determination of future experimental improvements of the ?? branching ratios and decay width.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/226092
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