期刊
PHYSICAL REVIEW D
卷 81, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.052005
关键词
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资金
- Ministry of Science and Technology of China [2009CB825200]
- National Natural Science Foundation of China (NSFC) [10625524, 10821063, 10825524, 10835001, 10935007]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- CAS [KJCX2-YW-N29, KJCX2-YW-N45]
- 100 Talents Program of CAS
- Istituto Nazionale di Fisica Nucleare, Italy
- Russian Foundation for Basic Research [08-02-92221, 08-02-92200-NSFC-a]
- Siberian Branch of Russian Academy of Science [32]
- Chinese University of Hong Kong Focused Investment [3110031]
- U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-91ER40682, DE-FG02-94ER40823]
- WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0]
- NSFC [10979038, 10875113]
Using a sample of 1.06 x 10(8) psi' decays collected by the BESIII detector, chi(c0) and chi(c2) decays into pi(0)pi(0) and eta eta are studied. The branching fraction results are Br(chi(c0) -> pi(0)pi(0)) = (3.23 +/- 0.03 +/- 0.23 +/- 0.14) x 10(-3), Br(chi(c2) -> pi(0)pi(0)) = (8.8 +/- 0.2 +/- 0.6 +/- 0.4) x 10(-4), Br(chi(c0) -> eta eta) = (3.44 +/- 0.10 +/- 0.24 +/- 0.2) x 10(-3), and Br(chi(c2) -> eta eta) = (6.5 +/- 0.4 +/- 0.5 +/- 0.3) x 10(-4), where the uncertainties are statistical, systematic due to this measurement, and systematic due to the branching fractions of psi' -> gamma chi(cJ). The results provide information on the decay mechanism of chi(c) states into pseudoscalars.
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