arXiv 1903.093072019-03hep-ex

测量$\sqrt{s}=2$ GeV下方的$e^+e^- \to π^+π^-π^0η$横截面

Measurement of the $e^+e^- \to π^+π^-π^0η$ cross section below $\sqrt{s}=2$ GeV

M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, L. V. Kardap… 展开作者

M. N. Achasov, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, V. B. Golubev, L. V. Kardapoltsev, A. G. Kharlamov, A. A. Korol, S. V. Koshuba, D. P. Kovrizhin, A. S. Kupich, R. A. Litvinov, A. P. Lysenko, K. A. Martin, N. A. Melnikova, N. Yu. Muchnoy, A. E. Obrazovsky, E. V. Pakhtusova, E. A. Perevedentsev, K. V. Pugachev, S. I. Serednyakov, P. Yu. Shatunov, Yu. M. Shatunov, D. A. Shtol, Z. K. Silagadze, A. N. Skrinsky, I. K. Surin, Yu. A. Tikhonov, A. V. Vasiljev, I. M. Zemlyansky

备注：: 17 pages, 11 figures, 3 tables. arXiv admin note: text overlap with arXiv:1607.00371
发表信息：: Phys. Rev. D 99, 112004 (2019)
DOI：: 10.1103/PhysRevD.99.112004

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摘要：

在VEPP-2000 $e^+e^-$对撞机上用SND探测器研究了质心能量低于2 GeV的$e^+e^- \to π^+π^-π^0η$过程.四种中间状态对这个过程有贡献：$ωη$、$ϕη$、$a_0(980)ρ$和无结构的$π^+π^-π^0η$状态。我们测量总$e^+e^- \to π^+π^-π^0η$截面和它的组成部分的截面：$ωη$，$ϕη$，和$a_0(980)ρ$和无结构状态的总和。我们的结果与以前的测量结果一致，并具有可比或更好的精度。

英文摘要：

The process $e^+e^- \to π^+π^-π^0η$ is studied in the center-of-mass energy region below 2 GeV with the SND detector at the VEPP-2000 $e^+e^-$ collider. The four intermediate states contribute to this process: $ωη$, $ϕη$, $a_0(980)ρ$, and a structureless $π^+π^-π^0η$ state. We measure the total $e^+e^- \to π^+π^-π^0η$ cross section and the cross sections for its components: $ωη$, $ϕη$, and a sum of $a_0(980)ρ$ and the structureless state. Our results are in agreement with previous measurements and have comparable or better accuracies.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

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