用新型核子自旋旋光计测量$^{1}H$（$\vecγ$，$\vec{p}$）$π^{0}$反应
Measurement of the $^{1}H$($\vecγ$, $\vec{p}$)$π^{0}$ reaction using a novel nucleon spin polarimeter
摘要：
我们报告的第一个大接受测量的偏振转移从一个偏振光子束反冲核子，开创了一种新的偏振技术，广泛应用于未来的核和强子物理实验。在$0.4<E_γ<1.4$ GeV范围内的$^{1}H$（$\vecγ$，$\vec{p}$）$π^{0}$反应中的极化转移的调试测量对于用于分波分析以提取核子激发谱的基本参数化是高度选择性的。新的数据强烈支持最近提出的Chew-Mandeltek形式主义。
英文摘要：
We report the first large-acceptance measurement of polarization transfer from a polarized photon beam to a recoiling nucleon, pioneering a novel polarimetry technique with wide application to future nuclear and hadronic physics experiments. The commissioning measurement of polarization transfer in the $^{1}H$($\vecγ$,$\vec{p}$)$π^{0}$ reaction in the range $0.4<E_γ<1.4$ GeV is highly selective regarding the basic parameterizations used in partial wave analyses to extract the nucleon excitation spectrum. The new data strongly favor the recently proposed Chew-Mandelstam formalism.
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