Observation of decays to and
Journal Article
·
· Physical Review. D.
Using a data sample of events collected with the BESIII detector, we report the first observation of the four-lepton-decays and utilizing the process . The branching fractions are determined to be and , respectively. The results are consistent with theoretical predictions. No significant signal is observed for , and an upper limit on the branching fraction is set at at the 90% confidence level. A asymmetry observable is constructed for the first two channels, which is measured to be and , respectively. No evidence for violation is observed in this process.
Published by the American Physical Society 2024- Research Organization:
- Indiana Univ., Bloomington, IN (United States); Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-05ER41374; SC0012069
- OSTI ID:
- 2324691
- Alternate ID(s):
- OSTI ID: 2579370
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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