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首页> 外文期刊>The European Physical Journal, A. Hadrons and Nuclei >Helicity dependence of the gamma p -> N pi channels and multipole analysis in the Delta region
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Helicity dependence of the gamma p -> N pi channels and multipole analysis in the Delta region

机译:γp-> N pi通道的螺旋度依赖性和三角洲地区的多极分析

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摘要

A high-quality double-polarization data set for the helicity dependence of the total and differential cross-sections for both gammap --> Npi channels in the Delta region has been obtained in the framework of the GDH experiment. The experiment, performed at the Mainz microtron MAMI, used a 4pi detection system, a circularly polarized photon beam, and a longitudinally polarized frozen-spin target. These data are included in the database to perform a multipole analysis to determine the properties of the Delta(1232)-resonance. For the resonant Delta(1232) multipoles we find a very good agreement with previous analyses, while the nonresonant ones show significant deviations.
机译:在GDH实验的框架内,获得了关于gammap-> Npi通道在Delta区域中总截面和微分截面的螺旋度依赖性的高质量双极化数据集。在Mainz microtron MAMI上进行的实验使用4pi检测系统,圆偏振光子束和纵向偏振的冷冻自旋靶。这些数据包括在数据库中,以执行多极点分析以确定Delta(1232)共振的属性。对于谐振Delta(1232)多极,我们发现与以前的分析非常吻合,而非谐振多极则显示出明显的偏差。

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