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arXiv 0802.3383nucl-th
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π介子和Ω介子产生的动力学耦合道计算

Dynamical coupled channel calculation of pion and omega meson production

Mark W. Paris

摘要:

本文用动力学耦合道方法研究了质子与π介子和光子散射引起的$π$和$ω$介子产生。采用$πN$、$ηN$、$πΔ$、$σN$、$ρN$和$ωN$六个中间通道描述非极化和极化数据。在一个有效的强子拉格朗日的裸参数确定在一个适合的数据$πN \to πN$,$γN \to πN$,$π^- p \to ωn$,和$γp \to ωp$反应的质心能量从阈值到$W < 2.0$ GeV。用这些拟合确定的$T$矩阵计算了$ω$ -介子产生的光子束不对称性和$ωN \toωN$总截面及$ωN$散射长度。

英文摘要:

A dynamical coupled channel approach is used to study $π$ and $ω$--meson production induced by pions and photons scattering from the proton. Six intermediate channels including $πN$, $ηN$, $πΔ$, $σN$, $ρN$ and $ωN$ are employed to describe unpolarized and polarized data. Bare parameters in an effective hadronic Lagrangian are determined in a fit to data for $πN \to πN$, $γN \to πN$, $π^- p \to ωn$, and $γp \to ωp$ reactions at center-of-mass energies from threshold to $W < 2.0$ GeV. The $T$ matrix determined in these fits is used to calculate the photon beam asymmetry for $ω$-meson production and the $ωN \toωN$ total cross section and $ωN$ scattering lengths.

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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