Study of e+e− → γϕJ/ψ from $$ \sqrt{s} $$ = 4.600 to 4.951 GeV

Journal article

Using data samples with an integrated luminosity of 6.4 fb−1 collected by the BESIII detector operating at the BEPCII storage ring, the process of e+e− → γϕJ/ψ is studied. The processes of e+e− → ϕχc1,c2, χc1,c2 → γJ/ψ are observed with a significance of more than 10σ. The s-dependent cross section of e+e− → ϕχc1,c2 is measured between 4.600 and 4.951 GeV, and evidence of a resonance structure is found for the first time in the ϕχc2 process. We also search for the processes of e+e− → γX(4140), γX(4274) and γX(4500) via the γϕJ/ψ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported. [Figure not available: see fulltext.]

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Albrecht, M; Aliberti, R

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2023
• Issue: 1
• Pages: 132
• Publication date: 2023-01-24
• DOI: 10.1007/jhep01(2023)132
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Electron–positron annihilation; Branching fraction