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Evidence for in e+e- → γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV M. Ablikim, M. N. Achasov, X. C. Ai [et.al.]

Contributor(s): Ablikim, M | Ai, X. C | Chelkov, G. A | Achasov, M. N | Томский государственный университет Радиофизический факультет Научные подразделения РФФMaterial type: ArticleArticleSubject(s): BESIII, детектор | BEPCII, коллайдер | столкновение частиц | адроны | позитроныGenre/Form: статьи в журналах Online resources: Click here to access online In: Chinese physics C Vol. 39, № 4. P. 041001-1-041001-9Abstract: 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−→γχcJ (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−→γχcJ ), as well as their upper limits at the 90% confidence level (C.L.) are determined at each center-of-mass energy.
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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−→γχcJ (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−→γχcJ ), as well as their upper limits at the 90% confidence level (C.L.) are determined
at each center-of-mass energy.

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