Journal
PHYSICAL REVIEW D
Volume 106, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.106.112007
Keywords
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Funding
- National Key R&D Program of China [2020YFA0406300, 2020YFA0406400]
- National Natural Science Foundation of China (NSFC) [11635010, 11735014, 11835012, 11935015, 11935016, 11935018, 11961141012, 12022510, 12025502, 12035009, 12035013, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- Joint Large-Scale Scientific Facility Funds of the NSFC
- CAS [U1832207]
- CAS Center for Excellence in Particle Physice (CCEPP)
- 100 Talents Program of CAS
- Institute of Nuclear and Particle Physics (INPAC)
- Shanghai Key Laboratory for Particle Physics and Cosmology
- ERC [758462]
- European Union [894790]
- German Research Foundation DFG [443159800, 455635585]
- Collaborative Research Center [CRC 1044, FOR5327, GRK 2149]
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Development of Turkey [DPT2006K-120470]
- National Science and Technology fund
- National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B16F640076]
- Olle Engkvist Foundation [200-0605]
- STFC (United Kingdom)
- Suranaree University of Technology (SUT)
- Thailand Science Research and Innovation (TSRI)
- National Science Research and Innovation Fund (NSRF) [160355]
- Royal Society, UK [DH140054, DH160214]
- Swedish Research Council
- U.S. Department of Energy [DE-FG0205ER41374]
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The decays J/psi -> eta Sigma(+)(Sigma) over bar (-) and psi(3686) -> eta Sigma(+)(Sigma) over bar (-) have been observed for the first time. The branching fractions of these two decays were determined using data collected with the BESIII detector, and the ratio of these branching fractions is found to agree with the 12% rule.
The decays J/psi -> eta Sigma(+)(Sigma) over bar (-) and psi(3686) -> eta Sigma(+)(Sigma) over bar (-) are observed for the first time, using (10087 +/- 44) x 10(6) J/psi and (448.1 +/- 2.9) x 10(6) psi(3686) events collected with the BESIII detector at the BEPCII collider. We determine the branching fractions of these two decays to be B(J/psi -> eta Sigma(+)(Sigma) over bar (-)) = (6.34 +/- 0.21 +/- 0.37) x 10(-5) and B(psi(3686) -> eta Sigma(+)(Sigma) over bar (-)) = ( 9.59 +/- 2.37 +/- 0.61) x 10(-6), where the first uncertainties are statistical and the second are systematic. The ratio of these two branching fractions is determined to be B(psi(3686) -> eta Sigma(+)(Sigma) over bar (-))/B(J/psi -> eta Sigma(+)(Sigma) over bar (-)) = (15.1 +/- 3.8)%, which is in agreement with the 12% rule.
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