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Measurement of e(+)e(-) -> pi(+)pi(-) psi(3686) from 4.008 to 4.600 gev and observation of a charged structure in the pi(+/-)psi(3686) mass spectrum

文献类型:期刊论文

作者Ablikim, M.1; Achasov, M. N.9,66; Ahmed, S.14; Ai, X. C.1; Albayrak, O.5; Albrecht, M.4; Ambrose, D. J.51; Amoroso, A.56,58; An, F. F.1; An, Q.53
刊名Physical review d
出版日期2017-08-31
卷号96期号:3页码:13
ISSN号2470-0010
DOI10.1103/physrevd.96.032004
通讯作者Ablikim, m.()
英文摘要We study the process e(+)e(-) -> p(+)p(-)psi(3686) using 5.1 fb(-1) of data collected at 16 center-of-mass energy (root s) points from 4.008 to 4.600 gev by the besiii detector operating at the bepcii collider. the measured born cross sections for e(+)e(-) -> p(+)p(-)psi(3686) are consistent with previous results, but with much improved precision. a fit to the cross section shows contributions from two structures: the first has m = 4209.5 +/- 7.4 +/- 1.4 mev/c(2) and gamma = 80.1 +/- 24.6 +/- 2.9 mev, and the second has m = 4383.8 +/- 4.2 +/- 0.8 mev/c(2) and gamma = 84.2 +/- 12.5 +/- 2.1 mev, where the first errors are statistical and the second systematic. the lower-mass resonance is observed in the process e(+)e(-) -> p(+)p(-)psi(3686) for the first time with a statistical significance of 5.8 sigma. a charged charmoniumlike structure is observed in the pi(+/-)psi(3686) invariant mass spectrum for data at root s = 4.416 gev. a fit with an s-wave breit-wigner function yields a mass m = 4032.1 +/- 2.4 mev/c(2), where the errors are statistical only. however, there are still unresolved discrepancies between the fit model and data. the width of the intermediate state varies in a wide range for different kinematic regions within the data set. therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.
WOS关键词PI-PI ; RADIATIVE-CORRECTIONS ; CHARMONIUM ; UPSILON ; ENERGY
WOS研究方向Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000408704400002
URI标识http://www.irgrid.ac.cn/handle/1471x/2177016
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, Hubei, Peoples R China
7.China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
8.COMSATS Inst Informat Technol, Def Rd,Off Raiwind Rd, Lahore 54000, Pakistan
9.GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia
10.GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
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GB/T 7714
Ablikim, M.,Achasov, M. N.,Ahmed, S.,et al. Measurement of e(+)e(-) -> pi(+)pi(-) psi(3686) from 4.008 to 4.600 gev and observation of a charged structure in the pi(+/-)psi(3686) mass spectrum[J]. Physical review d,2017,96(3):13.
APA Ablikim, M..,Achasov, M. N..,Ahmed, S..,Ai, X. C..,Albayrak, O..,...&Zou, J. H..(2017).Measurement of e(+)e(-) -> pi(+)pi(-) psi(3686) from 4.008 to 4.600 gev and observation of a charged structure in the pi(+/-)psi(3686) mass spectrum.Physical review d,96(3),13.
MLA Ablikim, M.,et al."Measurement of e(+)e(-) -> pi(+)pi(-) psi(3686) from 4.008 to 4.600 gev and observation of a charged structure in the pi(+/-)psi(3686) mass spectrum".Physical review d 96.3(2017):13.

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