2014/11/24 by BESIII Collaboration, M. Ablikim, М. Н. Ачасов +420 · 12 citations
Chemistry · Physics and Astronomy · #Atomic physics #Center (category theory) #Center of mass (relativistic) #Chemistry #Collider #Confidence interval #Crystallography #Electron–positron annihilation #Energy (signal processing) #Hadron #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Sigma #Statistics #hep-ex
paper · pdf · doi:10.1088/1674-1137/39/4/041001
published in Chinese Physics C 39(4), 041001 (IOP Publishing) · 8 pages, 7 figures, 3 tables
arxiv created 2014/11/24 · openalex publication_date 2015/04/01 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using data samples collected at center-of-mass energies of , 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process e + e − → γχ c J ( J =0, 1, 2) and find evidence for e + e − → γχ c1 and e + e − → γχ c2 with statistical significances of 3.0σ and 3.4σ, respectively. The Born cross sections σ B (e + e − → γχ c J ), as well as their upper limits at the 90% confidence level (C.L.) are determined at each center-of-mass energy.