In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2023, No. 1 ( 2023-01-24)
Abstract:
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 − → ϕχ c 1 , c 2 , χ c 1 , c 2 → γJ/ψ are observed with a significance of more than 10 σ . The $$ \sqrt{s} $$ s -dependent cross section of e + e − → ϕχ c 1 , c 2 is measured between 4.600 and 4.951 GeV, and evidence of a resonance structure is found for the first time in the ϕχ c 2 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.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP01(2023)132
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2027350-2
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