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arXiv 1612.02071hep-phnucl-th
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光生$γp \to ρ^- Δ^{++}(1232)$的正则化模型

Reggeized model for $γp \to ρ^- Δ^{++}(1232)$ photoproduction

Byung-Geel Yu, Kook-Jin Kong

摘要:

提出了一个反应模型$γp\toρ^-Δ^{++}$,其中$t$通道$π+ρ$交换被正则化以描述高能量的反应。结合高能反应截面的收敛性讨论了$ρ$交换的规范不变性。本文用全截面、微分截面和自旋密度矩阵元分析了$Δ^{++}$重子和$ρ^-$介子电磁多极矩的作用。光子偏振不对称性$Σ$预测的电磁矩的$ρ^-$和$Δ^{++}$的测量。

英文摘要:

A model for the reaction $γp\toρ^-Δ^{++}$ is presented with the $t$-channel $π+ρ$ exchanges reggeized to describe the reaction up to high energies. Gauge invariance of $ρ$ exchange is discussed in connection with the convergence of the reaction cross section at high energy. The roles of electromagnetic (EM) multipole moments of $Δ^{++}$ baryon and of $ρ^-$ meson are analyzed in total and differential cross sections and spin density matrix elements. Photon polarization asymmetry $Σ$ is predicted for a measurement of electromagnetic moments of $ρ^-$ and of $Δ^{++}$.

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。

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