论文标题
该过程的研究$ e^+e^ - \ toηπ^0γ$在能量范围中
Study of the process $e^+e^- \to ηπ^0γ$ in the energy range $\sqrt{s} = \mbox{1.05-2.00}$ GeV with the SND detector
论文作者
论文摘要
该过程$ e^+e^ - \toηπ^0γ$在质量中心能量范围内使用1.05-2.00 GEV使用数据，其集成亮度为94.5 pb $^{ - 1} $，由SND检测器在VEPP-200 $ E^+E^ - $ Collider上收集的SND检测器收集。首次测量$ e^+e^ - \toηπ^0γ$横截面。结果表明，该反应的主要机制是通过$ωη$中间状态的过渡。子过程$ e^+e^ - \toΩη\toηπ^0γ$的测量横截面与$ e^+e^ - \toπ^+π^-π^-π^0η$模式中的先前测量值一致。发现其显着性为5.6 $σ$，该过程$ e^+e^ - \toηπ^0γ$未完全由Hadronic vector-Pseudoscalar中间状态完全描述。这种缺失的贡献的横截面可以源于辐射过程，例如。 g。测量$ e^+e^ - \ to a_ {0}（1450）γ$。发现它在1.3至1.9 GEV的宽范围内为15-20 pb。
The process $e^+e^-\toηπ^0γ$ is studied in the center-of-mass energy range 1.05-2.00 GeV using data with an integrated luminosity of 94.5 pb$^{-1}$ collected by the SND detector at the VEPP-2000 $e^+e^-$ collider. The $e^+e^-\toηπ^0γ$ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $ωη$ intermediate state. The measured cross section of the subprocess $e^+e^-\toωη\toηπ^0γ$ is consistent with previous measurements in the $e^+e^-\toπ^+π^-π^0η$ mode. It is found, with a significance of 5.6$σ$, that the process $e^+e^-\toηπ^0γ$ is not completely described by hadronic vector-pseudoscalar intermediate states. The cross section of this missing contribution, which can originate from radiation processes, e. g. $e^+e^-\to a_{0}(1450)γ$, is measured. It is found to be 15-20 pb in the wide energy range from 1.3 to 1.9 GeV.
