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Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)
BESIII Collaboration
2011
发表期刊PHYSICAL REVIEW D
卷号84期号:9
通讯作者Ablikim, M (reprint author), Inst High Energy Phys, Beijing 100049, Peoples R China.
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.
关键词CHARMONIUM TRANSITIONS DETECTOR BESIII STATES
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.84.092006
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000297297700001
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213143
专题实验物理中心
作者单位中国科学院高能物理研究所
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BESIII Collaboration. Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)[J]. PHYSICAL REVIEW D,2011,84(9).
APA BESIII Collaboration.(2011).Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2).PHYSICAL REVIEW D,84(9).
MLA BESIII Collaboration."Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)".PHYSICAL REVIEW D 84.9(2011).
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