Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis
Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis
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DOI：
10.1140/epja/i2010-10950-x
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发表时间：
2010-05-01
影响因子：
2.7
通讯作者：
Thoma, U.
中科院分区：
文献类型：
--
作者：
Anisovich, A. V.;Klempt, E.;Thoma, U.
重子共振的质量、宽度和光耦合是在大量数据的耦合通道部分波分析中确定的。波恩-加特契纳分波形式被扩展为包括将 t 和 u 交换幅度分解为单独的分波。给出了 gamma p -> p pi(0) 和 gamma p -> n pi(+) 的多极跃迁振幅，并与其他分析的结果进行了比较。
Masses, widths and photocouplings of baryon resonances are determined in a coupled-channel partial-wave analysis of a large variety of data. The Bonn-Gatchina partial-wave formalism is extended to include a decomposition of t and u exchange amplitudes into individual partial waves. The multipole transition amplitudes for gamma p -> p pi(0) and gamma p -> n pi(+) are given and compared to results from other analyses.