Evidence for e+e-&rarr;&gamma;&chi;c1,2 at center-of-mass energies from 4.009 to 4.360 GeV

M. Ablikim; M. N. Achasov; X. C. Ai; et al. (BESⅢ collaboration)</font>

doi:10.1088/1674-1137/39/4/041001

Chinese Physics C> 2015, Vol. 39> Issue(4) : 041001 DOI: 10.1088/1674-1137/39/4/041001

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

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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 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.

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M. Ablikim, M. N. Achasov, X. C. Ai and et al. (BESⅢ collaboration). Evidence for e⁺e^-→γχ_c1,2 at center-of-mass energies from 4.009 to 4.360 GeV[J]. Chinese Physics C, 2015, 39(4): 041001. doi: 10.1088/1674-1137/39/4/041001

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Received: 2014-10-25
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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2014-10-25

Accepted Date: 1900-01-01

Available Online: 2015-04-05

Abstract: 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.

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

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

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