Measurement of the Born cross section for e + e − → p K − K − Ξ ¯ + at s = 3.5 – 4.9 GeV

Journal article

Using e+e− collision data corresponding to a total integrated luminosity of 20 fb−1 collected with the BESIII detector at the BEPCII collider, we present a measurement of the Born cross section for the process e+e−→pK−K−Ξ¯+ at 39 center-of-mass energies between 3.5 and 4.9 GeV with a partial reconstruction technique. By performing a fit to the dressed cross section of e+e−→pK−K−Ξ¯+ with a power law function for continuum production and one resonance at a time for the ψ(3770), ψ(4040), ψ(4160), ψ(4230), ψ(4360), ψ(4415) or ψ(4660), respectively, the upper limits for the product of partial electronic width and branching fraction into the final state pK−K−Ξ¯+ for these resonances are determined at the 90% confidence level.

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

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2025
• Issue: 11
• Article number: 111
• Publication date: 2025-11-19
• Acceptance date: 2025-10-20
• DOI: 10.1007/jhep11(2025)111
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Particle and Resonance Production; e+-e− Experiments; Branching fraction; QCD