Journal
PHYSICAL REVIEW D
Volume 84, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.092006
Keywords
-
Funding
- Ministry of Science and Technology of China [2009CB825200]
- National Natural Science Foundation of China [10625524, 10821063, 10825524, 10835001, 10935007]
- Chinese Academy of Sciences (CAS) [KJCX2-YW-N29, KJCX2-YW-N45, 32]
- Istituto Nazionale di Fisica Nucleare, Italy
- Siberian Branch of the Russian Academy of Science [32]
- U. S. Department of Energy [DE-FG02-04ER41291, DE-FG02-91ER40682, DE-FG02-94ER40823]
- University of Groningen
- Helmholtzzentrum fuer Schwerionenforschung GmbH, Darmstadt
- WCU of the National Research Foundation of Korea [R32-2008-000-10155-0]
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
