对于E $_γ$ =320 $-$ 650 MeV，$\overrightarrowγ \mathrm{p} \rightarrow π^{0} \mathrm{p}$的光子不对称性测量
Photon asymmetry measurements of $\overrightarrowγ \mathrm{p} \rightarrow π^{0} \mathrm{p}$ for E$_γ$=320$-$650 MeV
摘要：
在质量中心能量范围W=1214-1450 MeV内，对$\overrightarrowγ$ p $\rightarrowπ^{0}$ p反应的光子不对称性$\mathrmΣ$进行了高统计测量。这些数据是用德国美因茨的MAMI A2实光子束和Crystal Ball/TAPS探测器系统测量的。结果显着改善了现有的世界数据，并显示出良好的协议与以前的测量，并与MAID，SAID和Bonn-Gatchina的预测。我们还结合光子不对称性的结果与最近的截面测量从美因茨计算的轮廓函数，$\check{\mathrmΣ}$（= $σ_{0}\mathrmΣ$），并进行了矩分析。与Bonn-Gatchina模型计算结果的比较表明，数据的精度足以进一步限制较高的分波，并且在非常小的$F$ -波与$N(1520) 3/2^{-}$和$N(1535) 1/2^{-}$共振之间存在干扰。
英文摘要：
High statistics measurements of the photon asymmetry $\mathrmΣ$ for the $\overrightarrowγ$p$\rightarrowπ^{0}$p reaction have been made in the center of mass energy range W=1214-1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The results significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, $\check{\mathrmΣ}$ (= $σ_{0}\mathrmΣ$), and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small $F$-waves and the $N(1520) 3/2^{-}$ and $N(1535) 1/2^{-}$ resonances.
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。
