Photoproduction of mesons off nuclei

Photoproduction of mesons off nuclei
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离核介子的光产生

DOI:
10.1140/epjst/e2011-01491-2
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发表时间:
2011
期刊:
The European Physical Journal Special Topics
影响因子:
--
通讯作者:
Crystal Ball
Crystal Ball
中科院分区:
--
文献类型:
--
作者:
B. Krusche;Crystal Barrel;Crystal Ball

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回顾了离核介子光产生的最新结果。这些实验是针对与强相互作用特性相关的两个主要研究领域进行的。核子共振的研究需要轻核作为提取电磁激发的同位旋组成的目标。这是通过束缚中子的准自由介子光产生来完成的,并辅以相干光产生反应的测量,充当自旋和/或同位旋滤波器。此外,轻核和重核的光产生是研究介子与核物质的相互作用以及强子的介质特性的非常有效的工具。由于高质量标记(和偏振)光子束与最先进的 4π 探测器和偏振目标的结合,实验目前正在迅速发展。
Recent results for the photoproduction of mesons off nuclei are reviewed. These experiments have been performed for two major lines of research related to the properties of the strong interaction. The investigation of nucleon resonances requires light nuclei as targets for the extraction of the isospin composition of the electromagnetic excitations. This is done with quasi-free meson photoproduction off the bound neutron and supplemented with the measurement of coherent photoproduction reactions, serving as spin and/or isospin filters. Furthermore, photoproduction from light and heavy nuclei is a very efficient tool for the study of the interactions of mesons with nuclear matter and the in-medium properties of hadrons. Experiments are currently rapidly developing due to the combination of high quality tagged (and polarized) photon beams with state-of-the-art 4π detectors and polarized targets.
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