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	Observation of a resonance x(1835) in j/psi ->gamma pi(+)pi(-)eta(')
	Ablikim, M; Bai, JZ; Ban, Y; Bian, JG; Cai, X; Chen, HF; Chen, HS; Chen, HX; Chen, JC; Chen, J
刊名	Physical review letters
	2005-12-31
卷号	95期号:26页码:5
ISSN号	0031-9007
DOI	10.1103/physrevlett.95.262001
通讯作者	Ablikim, m()
英文摘要	The decay channel j/psi ->gamma pi(+)pi(-)eta(') is analyzed using a sample of 5.8x10(7) j/psi events collected with the besii detector. a resonance, the x(1835), is observed in the pi(+)pi(-)eta(') invariant-mass spectrum with a statistical significance of 7.7 sigma. a fit with a breit-wigner function yields a mass m = 1833.7 +/- 6.1(stat)+/- 2.7(syst) mev/c(2), a width gamma=67.7 +/- 20.3(stat)+/- 7.7(syst) mev/c(2), and a product branching fraction b(j/psi ->gamma x)center dot b(x ->pi(+)pi(-)eta('))=[2.2 +/- 0.4(stat)+/- 0.4(syst)]x10(-4). the mass and width of the x(1835) are not compatible with any known meson resonance. its properties are consistent with expectations for the state that produces the strong p (p) over bar mass threshold enhancement observed in the j/psi ->gamma p (p) over bar process at besii.
WOS关键词	QUASI-NUCLEAR ; ENHANCEMENT ; SCATTERING ; BARYONIUM ; PHYSICS ; STATE
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	AMERICAN PHYSICAL SOC
WOS记录号	WOS:000234337900029
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2175782
专题	高能物理研究所
通讯作者	Ablikim, M
作者单位	1.Inst High Energy Phys, Beijing 100049, Peoples R China 2.CCAST, Beijing 100080, Peoples R China 3.Guangxi Normal Univ, Guilin 541004, Peoples R China 4.Guangxi Univ, Nanning 530004, Peoples R China 5.Henan Normal Univ, Xinxiang 453002, Peoples R China 6.Huazhong Normal Univ, Wuhan 430079, Peoples R China 7.Hunan Univ, Changsha 410082, Peoples R China 8.Liaoning Univ, Shenyang 110036, Peoples R China 9.Nanjing Normal Univ, Nanjing 210097, Peoples R China 10.Nankai Univ, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Ablikim, M,Bai, JZ,Ban, Y,et al. Observation of a resonance x(1835) in j/psi ->gamma pi(+)pi(-)eta(')[J]. Physical review letters,2005,95(26):5.
APA	Ablikim, M.,Bai, JZ.,Ban, Y.,Bian, JG.,Cai, X.,...&Zou, BS.(2005).Observation of a resonance x(1835) in j/psi ->gamma pi(+)pi(-)eta(').Physical review letters,95(26),5.
MLA	Ablikim, M,et al."Observation of a resonance x(1835) in j/psi ->gamma pi(+)pi(-)eta(')".Physical review letters 95.26(2005):5.

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