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Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the KLOE detector
KLOE Collaboration
2007
发表期刊PHYSICS LETTERS B
卷号648期号:4页码:267-273
通讯作者Di Donato, C (reprint author), Univ Naples Federico II, Dipartimento Sci Fisiche, Naples, Italy.
摘要We have measured the ratio R-phi = BR(phi ->eta'gamma)/BR phi ->eta gamma) by looking for the radiative decays phi ->eta'gamma and phi ->eta gamma into the final states pi(+)pi(-)7 gamma and 7 gamma, respectively, in a sample of similar to 1.4 x 10(9) phi mesons produced at the Frascati phi factory. We obtain R phi = (4.77 +/- 0.09(stat) +/- 0.19(syst)) x 10(-3) from which we derive BR(phi ->eta'gamma) = (6.20 +/- 0.11(stat) +/- 0.25(syst)) x 10(-5). Assuming the eta' has zero gluonium content, we extract the pseudoscalar mixing angle in the quark-flavor basis, phi(P) = (41.4 +/- 0.3(stat) +/- 0.7(syst) +/- 0.6(th))degrees. Combining the value of R-phi with other constraints, we estimate the fractional gluonium content of the eta' to be Z(2) = 0.14 +/- 0.04 and the mixing angle to be phi(P) = (39.7 +/- 0.7)degrees. (C) 2007 Elsevier B.V. All rights reserved.
关键词DECAY MESONS
学科领域Physics
DOI10.1016/j.physletb.2007.03.032
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000246512500001
引用统计
被引频次:87[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212811
专题实验物理中心
作者单位中国科学院高能物理研究所
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KLOE Collaboration. Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the KLOE detector[J]. PHYSICS LETTERS B,2007,648(4):267-273.
APA KLOE Collaboration.(2007).Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the KLOE detector.PHYSICS LETTERS B,648(4),267-273.
MLA KLOE Collaboration."Measurement of the pseudoscalar mixing angle and eta ' gluonium content with the KLOE detector".PHYSICS LETTERS B 648.4(2007):267-273.
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