Journal
PHYSICAL REVIEW D
Volume 105, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.072002
Keywords
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Funding
- National Key Basic Research Program of China [2020YFA0406300, 2020YFA0406400]
- National Natural Science Foundation of China (NSFC) [11625523, 11635010, 11675183, 11735014, 11822506, 11835012, 11922511, 11935015, 11935016, 11935018, 11961141012, 12022510, 12025502, 12035009, 12035013, 12061131003]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- Joint Large-Scale Scientific Facility Funds of the NSFC and CAS [U1732103, U1732263, U1832207]
- CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040]
- 100 Talents Program of CAS
- INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology
- ERC [758462]
- European Union [894790]
- German Research Foundation DFG [443159800, CRC 1044, FOR 2359, GRK 214]
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Development of Turkey [DPT2006K-120470]
- National Science and Technology fund
- Olle Engkvist Foundation [200-0605]
- STFC (United Kingdom)
- Knut and AliceWallenberg Foundation (Sweden) [2016.0157]
- Royal Society, UK [DH140054, DH160214]
- Swedish Research Council
- U.S. Department of Energy [DE-FG02-05ER41374, DE-SC-0012069]
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Using the BESIII detector, a partial wave analysis of J/Psi -> gamma eta'eta' is conducted with a sample of (10.09 +/- 0.04) x 10(9) J/Psi events. The resonance masses and widths, as well as their branching fractions, are reported, with the main contribution coming from J/Psi -> gamma f(0) (2020) with f(0) (2020) -> eta'eta'. The measured product branching fraction B(J/Psi -> gamma f(0) (2020)) -> eta'eta') is (2.63 +/- 0.06(stat.)(-0.46)(+0.31)(syst.)) x 10(-4).
Using a sample of (10.09 +/- 0.04) x 10(9) J/Psi events collected with the BESIII detector, a partial wave analysis of J/Psi -> gamma eta'eta' is performed. The masses and widths of the observed resonances and their branching fractions are reported. The main contribution is from J/Psi -> gamma f(0) (2020) with f(0) (2020) -> eta'eta', which is found with a significance of greater than 25 sigma. The product branching fraction B(J/Psi -> gamma f(0) (2020)) -> eta'eta') is measured to be (2.63 +/- 0.06(stat.)(-0.46)(+0.31)(syst.)) x 10(-4).
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