Publication Date:
2015-04-22
Description:
Using data samples collected at center-of-mass energies of √ s = 4.009, 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.
Print ISSN:
1674-1137
Topics:
Physics
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