Observation of the dalitz decay eta ' -> gamma e(+)e(-)
文献类型：期刊论文
| 作者 | Ablikim, M.1; Achasov, M. N.9,60; Ai, X. C.1; Albayrak, O.5; Albrecht, M.4; Ambrose, D. J.49; Amoroso, A.53,55; An, F. F.1; An, Q.50; Bai, J. Z.1 |
| 刊名 | Physical review d
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 92期号:1页码:11 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/physrevd.92.012001 |
| 通讯作者 | Chu, x. k.(chuxk@pku.edu.cn) |
| 英文摘要 | We report the first observation of the dalitz decay eta' -> gamma e(+)e(-), based on a data sample of 1.31 billion j/psi events collected with the besiii detector. the eta' mesons are produced via the j/psi -> gamma eta' decay process. the ratio (eta' -> gamma e(+)e(-))/gamma (eta' -> gamma gamma) is measured to be (2.13 +/- 0.09(stat) +/- 0.07(sys)) x 10(-2). this corresponds to a branching fraction b(eta' -> gamma e(+)e(-)) = (4.69 +/- 0.20(stat) +/- 0.23(sys)) x 10(-4). the transition form factor is extracted and different expressions are compared to the measured dependence on the e(+)e(-) invariant mass. the results are consistent with the prediction of the vector meson dominance model. |
| WOS关键词 | ELECTROMAGNETIC FORM-FACTORS ; DOMINANCE ; MESONS ; BESIII ; PI-0 |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000357162400002 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176419 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Chu, X. K. |
| 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, 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 |
| 推荐引用方式 GB/T 7714 | Ablikim, M.,Achasov, M. N.,Ai, X. C.,et al. Observation of the dalitz decay eta ' -> gamma e(+)e(-)[J]. Physical review d,2015,92(1):11. |
| APA | Ablikim, M..,Achasov, M. N..,Ai, X. C..,Albayrak, O..,Albrecht, M..,...&Zou, J. H..(2015).Observation of the dalitz decay eta ' -> gamma e(+)e(-).Physical review d,92(1),11. |
| MLA | Ablikim, M.,et al."Observation of the dalitz decay eta ' -> gamma e(+)e(-)".Physical review d 92.1(2015):11. |
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