This paper presents new results for the T20-component of the tensor analyzing power of the reaction γd → pnπ0 in the photon energy range of 300MeV < Eγ < 500MeV. The experimental statistics accumulated in 2013 at the VEPP-3 accelerator-storage complex is used. The reaction events are identified by the coincidence registration of the proton and two γ-quanta from the decay of the neutral pion. To determine the T20-component, the asymmetry of the yields with respect to the change of sign of the tensor polarization of the deuterium target is measured. The experimental results are compared with the theoretical calculations in which the MAID 2007 model is used as the elementary pion–nucleon photoproduction amplitude and contributions from the pion–nucleon and nucleon–nucleon rescattering are taken into account.

中文翻译：

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反应γd→pnπ0的张量分析能力T20的测量

本文提出了新的结果吨20- 反应的张量分析能力的分量γd → pnπ0在光子能量范围内300电子伏特 < 乙γ < 500电子伏特. 使用了 2013 年在 VEPP-3 加速器存储综合体积累的实验统计数据。反应事件由质子的重合记录和两个γ-来自中性介子衰变的量子。确定吨20-分量，测量相对于氘靶张量极化符号变化的产率不对称性。将实验结果与使用 MAID 2007 模型作为基本介子 - 核子光产生幅度的理论计算结果进行了比较，并考虑了介子 - 核子和核子 - 核子再散射的贡献。