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	Observation of a p(p)over-bar mass threshold enhancement in psi ' -> pi(+)pi(-)j/psi(j/psi -> gamma p(p)over-bar) decay
	Ablikim, M.1; Achasov, M. N.5; An, L.9; An, Q.31; An, Z. H.1; Bai, J. Z.1; Ban, Y.18; Berger, N.1; Bian, J. M.1; Boyko, I.13
刊名	Chinese physics c
	2010-04-01
卷号	34期号:4页码:421-426
关键词	P(p)over-bar Threshold enhancement
ISSN号	1674-1137
通讯作者	Ablikim, m.()
英文摘要	The decay channel psi' -> pi(+)pi(-)j/psi(j/psi -> gamma p (p) over bar) is studied using a sample of 1.06 x 10(8) psi' events collected by the besiii experiment at bepcii. a strong enhancement at threshold is observed in the pp invariant mass spectrum. the enhancement can be fitted with an s-wave breit-wigner resonance function with a resulting peak mass of m = 1861(-13)(+6) (stat)(-26)(+7) (syst) mev/c(2) and a narrow width that is gamma < 38 mev/c(2) at the 90% confidence level. these results are consistent with published besii results. these mass and width values do not match with well established mesons.
WOS关键词	QUASI-NUCLEAR ; SCATTERING ; BARYONIUM ; PHYSICS
WOS研究方向	Physics
WOS类目	Physics, Nuclear ; Physics, Particles & Fields
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000276679900001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176021
专题	高能物理研究所
通讯作者	Ablikim, M.
作者单位	1.CAS, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Ruhr Univ Bochum, D-44780 Bochum, Germany 3.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 4.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China 5.GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia 6.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 7.GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany 8.Guangxi Normal Univ, Guilin 541004, Peoples R China 9.Guangxi Univ, Nanning 530004, Peoples R China 10.Henan Normal Univ, Xinxiang 453007, Peoples R China
推荐引用方式 GB/T 7714	Ablikim, M.,Achasov, M. N.,An, L.,et al. Observation of a p(p)over-bar mass threshold enhancement in psi ' -> pi(+)pi(-)j/psi(j/psi -> gamma p(p)over-bar) decay[J]. Chinese physics c,2010,34(4):421-426.
APA	Ablikim, M..,Achasov, M. N..,An, L..,An, Q..,An, Z. H..,...&Zweber, P..(2010).Observation of a p(p)over-bar mass threshold enhancement in psi ' -> pi(+)pi(-)j/psi(j/psi -> gamma p(p)over-bar) decay.Chinese physics c,34(4),421-426.
MLA	Ablikim, M.,et al."Observation of a p(p)over-bar mass threshold enhancement in psi ' -> pi(+)pi(-)j/psi(j/psi -> gamma p(p)over-bar) decay".Chinese physics c 34.4(2010):421-426.

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