Evidence for e+e-→γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV |
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引用本文: | 麦迪娜,M. N. Achasov,艾小聪 et al..Evidence for e+e-→γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV[J].中国物理 C,2015,39(4). |
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作者姓名: | 麦迪娜 M. N. Achasov 艾小聪 |
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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-→γχc,j (J =0, 1, 2) and find evidence for e+e-→γχc1 and e+e-→γχc2 with statistical significances of 3.0σ and 3.4σ, respectively. The Born cross sections σB(e+e-→γχc,j), as well as their upper limits at the 90% con dence level (C.L.) are determined at each center-of-mass energy.
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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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