期刊
PHYSICAL REVIEW D
卷 78, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.011102
关键词
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资金
- A. P. Sloan Foundation
- National Science Foundation
- U. S. Department of Energy
- Natural Sciences and Engineering Research Council of Canada
- U. K. Science and Technology Facilities Council
- Science and Technology Facilities Council [PPA/A/S/2003/00461/2, PP/E002722/1, PP/F000650/1, ST/G502412/1] Funding Source: researchfish
- STFC [PP/F000650/1, ST/G502412/1, PP/E002722/1] Funding Source: UKRI
We report determination of branching fractions for the decays psi(2S)-> h+J/psi, where h=any, pi(+)pi(-), pi(0)pi(0), eta, pi(0), and gamma gamma through chi(c0,1,2). These measurements use 27M psi(2S) decays produced in e(+)e(-) collision data collected with the CLEO detector. The resulting branching fractions and ratios thereof improve upon previously achieved precision in all cases, and in combination with other measurements permit determination of B(chi(cJ)->gamma J/psi) and B(psi(2S)-> light hadrons).
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