Photoproduction of multi-meson final states - recent results from the Crystal-Barrel/TAPS experiment at ELSA-

被引：0
作者：
Thoma, U. [1 ]
机构：
[1] Univ Bonn, HISKP, Nussallee 14-16, D-53115 Bonn, Germany
来源：
CHINESE PHYSICS C | 2009年 / 33卷 / 12期
关键词：
baryon spectroscopy; photoproduction; multi-meson filial states; polarisation observables; BEAM ASYMMETRY; QUARK-MODEL; BARYON; RESONANCES;
D O I：
10.1088/1674-1137/33/12/010
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Multi-meson final states such as gamma p -> p pi(0)pi(0) and gamma p -> p pi(0)eta have been investigated with the Crystal-Barrel/TAPS experiment at ELSA. Baryon cascades via Delta pi and Delta eta and also via, higher mass baryon resonances are clearly observed Based on this data and on data from other reactions a partial wave analysis has been performed from which partial decay widtlis of various N* and Delta* states into the different p pi(0)pi(0) and p pi(0)eta decay channels have been determined, leading partly to unexpected results In addition, polarisation observables have been investigated. The beam asymmetry Sigma has been determined for both reactions and double polarisation data using a longitudinally polarised target and a circularly or linearly polarised photon beam has been taken given the angular coverage of the Crystal-Barrel/TAPS experiment, this data covers almost the full angular range and phase space This data will provide new and important information for the partial wave analyses and bring us one stop closer towards a complete experiment.
引用
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页码：1105 / 1112
页数：8
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