For the reaction $\gamma p\to \omega p$, differential cross sections, photon beam asymmetries, and spin density matrix elements have been measured in the LEPS2/BGOegg experiment at SPring-8 by using a large acceptance electromagnetic calorimeter. A $1.3$–$2.4$~$GeV$ photon beam with high linear polarization has enabled a precision measurement of photon beam asymmetries $\Sigma$ and polarized spin density matrix elements ${\rho }_{1-1}^1$ over a wide angular range, especially above the total energy of about $2$~$GeV$ for the first time. The measured ${\rho }_{1-1}^1$ indicates the dominance of s-channel resonances even at higher energies. The $\Sigma$ values at backward angles are not reproduced by the existing partial wave analysis in the highest energy region, providing new constraints to the contribution of nucleon resonances with high spins.

中文翻译：

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在Eγ= 1.3–2.4 GeV处质子上ω光生的微分截面，光子束不对称和自旋密度矩阵元素

对于反应 $\gamma p\to \omega p$，差分截面，光子束不对称性和自旋密度矩阵元素已在SPring-8的LEPS2 / BGOegg实验中通过使用大型可接受的电磁热量计进行了测量。一种$1.3$–$2.4$〜$GËV$ 具有高线性极化的光子束可以精确测量光子束的不对称性 $\Sigma$ 和极化自旋密度矩阵元素 ${\rho }_{\mathrm{1个}-\mathrm{1个}}^{\mathrm{1个}}$ 在较大的角度范围内，尤其是在约 $2$〜$GËV$首次。实测${\rho }_{\mathrm{1个}-\mathrm{1个}}^{\mathrm{1个}}$表示即使在更高的能量下，S沟道谐振也占主导地位。的$\Sigma$ 在最高能量区域中，现有的部分波分析无法再现后向角的数值，从而为高自旋的核子共振贡献提供了新的限制。