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	Precise measurement of the e(+)e(-) ->pi(+)pi(-) j/psi cross section at center-of-mass energies from 3.77 to 4.60 gev
	Ablikim, M.1; Achasov, M. N.9; Ahmed, S.14; Ai, X. C.1; Albayrak, O.5; Albrecht, M.4; Ambrose, D. J.50; Amoroso, A.55,57; An, F. F.1; An, Q.52
刊名	Physical review letters
	2017-03-01
卷号	118期号:9页码:8
ISSN号	0031-9007
DOI	10.1103/physrevlett.118.092001
通讯作者	Ablikim, m.()
英文摘要	The cross section for the process e(+)e(-)-> pi(+) pi(-) j/psi is measured precisely at center-of-mass energies from 3.77 to 4.60 gev using 9 fb(-1) of data collected with the besiii detector operating at the bepcii storage ring. two resonant structures are observed in a fit to the cross section. the first resonance has a mass of (222.0 +/- 3.1 +/- 1.4) mev/ c(2) and a width of (44.1 +/- 4.3 +/- 2.0)mev, while the second one has a mass of (4320.0 +/- 10.4 +/- 7.0)mev/c(2) and a width of (101.4(- 19.7)(+25.3) +/- 10.2) mev, where the first errors are statistical and second ones are systematic. the first resonance agrees with the y(4260) resonance reported by previous experiments. the precision of its resonant parameters is improved significantly. the second resonance is observed in e(+)e(-)-> pi(+) pi(-) j/psi for the first time. the statistical significance of this resonance is estimated to be larger than 7.6 sigma. the mass and width of the second resonance agree with the y(4360) resonance reported by the babar and belle experiments within errors. finally, the y(4008) resonance previously observed by the belle experiment is not confirmed in the description of the besiii data.
WOS关键词	CHARMONIUM ; MESONS ; MODEL ; Y(4260) ; DECAY
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000396043900003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176752
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.Beihang Univ, Beijing 100191, Peoples R China 3.Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China 4.Ruhr Univ Bochum, D-44780 Bochum, Germany 5.Carnegie Mellon Univ, Pittsburgh, PA 15213 USA 6.Cent China Normal Univ, Wuhan 430079, Peoples R China 7.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China 8.COMSATS Inst Informat Technol, Def Rd,Raiwind Rd, Lahore 54000, Pakistan 9.GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia 10.GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
推荐引用方式 GB/T 7714	Ablikim, M.,Achasov, M. N.,Ahmed, S.,et al. Precise measurement of the e(+)e(-) ->pi(+)pi(-) j/psi cross section at center-of-mass energies from 3.77 to 4.60 gev[J]. Physical review letters,2017,118(9):8.
APA	Ablikim, M..,Achasov, M. N..,Ahmed, S..,Ai, X. C..,Albayrak, O..,...&Zou, J. H..(2017).Precise measurement of the e(+)e(-) ->pi(+)pi(-) j/psi cross section at center-of-mass energies from 3.77 to 4.60 gev.Physical review letters,118(9),8.
MLA	Ablikim, M.,et al."Precise measurement of the e(+)e(-) ->pi(+)pi(-) j/psi cross section at center-of-mass energies from 3.77 to 4.60 gev".Physical review letters 118.9(2017):8.

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