Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)
文献类型：期刊论文
| 作者 | Ablikim, M.1; Achasov, M. N.5; Alberto, D.40,41; An, F. F.1; An, Q.38; An, Z. H.1; Bai, J. Z.1; Baldini, R.19; Ban, Y.25; Becker, J.2 |
| 刊名 | Physical review d
 |
| 出版日期 | 2011-11-22 |
| 卷号 | 84期号:9页码:9 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/physrevd.84.092006 |
| 通讯作者 | Ablikim, m.() |
| 英文摘要 | Using 106 x 10(6) psi' events collected with the besiii detector at the bepcii storage ring, the higher-order multipole amplitudes in the radiative transition psi' -> gamma chi(c2) -> gamma pi(+)pi(-)/gamma k+k- are measured. a fit to the chi(c2) production and decay angular distributions yields m2 = 0.046 +/- 0.010 +/- 0.013 and e3 = 0.015 +/- 0.008 +/- 0.018, where the first errors are statistical and the second systematic. here m2 denotes the normalized magnetic quadrupole amplitude and e3 the normalized electric octupole amplitude. this measurement shows evidence for the existence of the m2 signal with 4.4 sigma statistical significance and is consistent with the charm quark having no anomalous magnetic moment. |
| WOS关键词 | CHARMONIUM ; TRANSITIONS ; DETECTOR ; BESIII ; STATES |
| 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:000297297700001 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176147 |
| 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.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, 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.Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ablikim, M.,Achasov, M. N.,Alberto, D.,et al. Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)[J]. Physical review d,2011,84(9):9. |
| APA | Ablikim, M..,Achasov, M. N..,Alberto, D..,An, F. F..,An, Q..,...&Zuo, J. X..(2011).Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2).Physical review d,84(9),9. |
| MLA | Ablikim, M.,et al."Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)".Physical review d 84.9(2011):9. |
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来源：高能物理研究所
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