Evidence for at center-of-mass energies between 4.01 and 4.60 GeV
Journal Article
·
· Physical Review D
In this paper, we present first evidence for the process e+e- → γηc(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve ηc(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. Finally, if the process is assumed to proceed via the Y (4260), we measure a peak Born cross section σpeak (e+e- → γηc(1S)) = 2.11 ± 0.49(stat.) ± 0.36(syst.) pb with a statistical significance of 4.2σ.
- Research Organization:
- George Washington Univ., Washington, DC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- BESIII Collaboration
- Grant/Contract Number:
- SC0016583; FG02-05ER41374; SC0010504; SC0012069; SC0010118
- OSTI ID:
- 1440865
- Alternate ID(s):
- OSTI ID: 1378831
- Journal Information:
- Physical Review D, Vol. 96, Issue 5; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 9 works
Citation information provided by
Web of Science
Web of Science
Study of and evidence for decaying into
|
journal | December 2019 |
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