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

	A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson
	KLOE Collaboration
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2009
期号	7
关键词	PARTICLE PHYSICS KLOE DETECTOR
通讯作者	Di Micco, B (reprint author), Univ Roma Tre, Dipartimento Fis, Via Vasca Navale 84, Rome, Italy.
英文摘要	We update the values of the eta-eta' mixing angle and of the eta' gluonium content by fitting our measurement R(phi) = BR(phi -> eta gamma)/BR(phi -> eta gamma) together with several vector meson radiative decays to pseudoscalars (V -> P gamma), pseudoscalar mesons radiative decays to vectors (P -> V gamma) and the eta' -> gamma gamma, pi(0) -> gamma gamma widths. From the fit we extract a gluonium fraction of Z(G)(2) = 0.12 +/- 0.04, the pseudoscalar mixing angle psi(P) = (40.4 +/- 0.6)degrees and the phi - omega mixing angle psi(V) = (3.32 +/- 0.09)degrees. Z(G)(2) and psi(P) are fairly consistent with those previously published. We also evaluate the impact on the eta' gluonium content determination of future experimental improvements of the eta' branching ratios and decay width.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000270219900105
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212907]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	KLOE Collaboration. A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson[J]. JOURNAL OF HIGH ENERGY PHYSICS,2009(7).
APA	KLOE Collaboration.(2009).A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson.JOURNAL OF HIGH ENERGY PHYSICS(7).
MLA	KLOE Collaboration."A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta ' meson".JOURNAL OF HIGH ENERGY PHYSICS .7(2009).