Evidence for e+e-→γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Evidence for e⁺e^-→γχ_c1,2 at center-of-mass energies from 4.009 to 4.360 GeV

作者姓名：	麦迪娜 M. N. Achasov 艾小聪 et al. (BESⅢ collaboration)

摘要：	Using data samples collected at center-of-mass energies of √s=4.009, 4.230, 4.260, and 4.360 GeV with the BES0 detector operating at the BEPC/ 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% con dence level (C.L.) are determined at each center-of-mass energy.
关键词：	heavy quarkonia decays of hadronic electron-positron collisions hadron production by
收稿时间：	2014-10-25

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