Evidence of two resonant structures in e(+)e(-)->pi(+) pi(-) h(c)
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 118期号:9页码:8 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/physrevlett.118.092002 |
| 通讯作者 | Ablikim, m.() |
| 英文摘要 | The cross sections of e(+)e(-) -> pi(+) pi(-) hc at center-of-mass energies from 3.896 to 4.600 gevare measured using data samples collected with the besiii detector operating at the beijing electron positron collider. the cross sections are found to be of the same order of magnitude as those of e(+)e(-) -> pi(+) pi(-) j/psi and e(+)e(-) -> pi(+) pi(-) psi (2s), but the line shape is inconsistent with the y states observed in the latter two modes. two structures are observed in the e(+)e(-) -> pi(+) pi(-) hc cross sections around 4.22 and 4.39 gev/c(2), which we call y(4220)and y(4390), respectively. a fit with a coherent sum of two breit-wigner functions results in a mass of (4218.4(- 4.5)(vertical bar 5.5) +/- 0.9) mev/ c(2) and a width of (66.0(- 8.3)(vertical bar 12.3) +/- 0.4) mev for the y(4220), and a mass of (4391.5(- 6.8)(+6.3) +/- 1.0) mev/c(2) and a width of (139.5(- 20.6)(+16.2) +/- 0.6) mev for the y(4390), where the first uncertainties are statistical and the second ones systematic. the statistical significance of y(4220) and y(4390) is 10 sigma over one structure assumption. |
| WOS关键词 | ENERGY |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000396043900004 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176794 |
| 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. Evidence of two resonant structures in e(+)e(-)->pi(+) pi(-) h(c)[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).Evidence of two resonant structures in e(+)e(-)->pi(+) pi(-) h(c).Physical review letters,118(9),8. |
| MLA | Ablikim, M.,et al."Evidence of two resonant structures in e(+)e(-)->pi(+) pi(-) h(c)".Physical review letters 118.9(2017):8. |
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