Branching ratios of J/psi ->pi(0)3(pi(+) pi(-))

	Branching ratios of J/psi ->pi(0)3(pi(+) pi(-))
	BES Callaboration
刊名	HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
	2002
卷号	26 期号:1 页码:8-16
关键词	FLUX-TUBE MODEL 18 GEV/C HYBRID MESONS EXOTIC MESON LATTICE SYSTEM DECAYS STATE QCD
通讯作者	Bai, JZ (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
英文摘要	The decay mode of J/psi-->pidegrees3(pi(+)pi(-)) was studied very little before. There axe no informations except branching ratios for this channel in PDG book which based on less than 0.2 x 10(6) J/psi events of MARK I. Now, BES I has a data sample of 7.8 x 10(6) J/psi events, we can make more accurate results than MARK I. Total of 3290 +/- 43 J/psi-->pidegrees3(pi(+)pi(-)) events including 1275 +/- 86 J/psi-->omega2(pi(+)pi(-)) events are selected. J/psi-->pidegrees3(pi(+)pi(-)) and J/psi-->omega2(pi(+)pi(-)) events have been generated with MC simulition for calculating events selection efficiency. BES I result is: Br (J/psi-->pidegrees3(pi(+)pi(-))) = (2.52 +/- 0.06 +/- 0.43)% and Br(J/psi-->omega2(pi(+)pi(-))) = ( 1.31 +/- 0.09 +/- 0.21)%. Meanwhile, we studied the invariant Mass of 4pi and omegapipi to find interesting signals. It seems that there is a peak at about 1.74GeV in the invarianat mass spectrum of 4pi, and a enhancement was also found at about 1.9GeV in the invariant mass spectrum of omegapipi. It is not clear whether the), are from resonances or background. Therefore, more work in detail is still going on.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
收录类别	SCI
语种	中文
WOS记录号	WOS:000173496100002
公开日期	2016-02-25
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212163]
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	BES Callaboration. Branching ratios of J/psi ->pi(0)3(pi(+) pi(-))[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2002,26(1):8-16.
APA	BES Callaboration.(2002).Branching ratios of J/psi ->pi(0)3(pi(+) pi(-)).HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,26(1),8-16.
MLA	BES Callaboration."Branching ratios of J/psi ->pi(0)3(pi(+) pi(-))".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 26.1(2002):8-16.