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Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)

文献类型:期刊论文

AuthorAblikim, 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
SourcePhysical review d
Issued Date2011-11-22
Volume84Issue:9Pages:9
ISSN1550-7998
DOI10.1103/physrevd.84.092006
Corresponding AuthorAblikim, m.()
English AbstractUsing 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 KeywordCHARMONIUM ; TRANSITIONS ; DETECTOR ; BESIII ; STATES
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
Language英语
WOS IDWOS:000297297700001
PublisherAMER PHYSICAL SOC
URIhttp://www.irgrid.ac.cn/handle/1471x/2176147
Collection高能物理研究所
Corresponding AuthorAblikim, M.
Affiliation1.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
Recommended Citation
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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