Kaon photoproduction: Data consistency, coupling constants, and polarization observables.
Kaon photoproduction: Data consistency, coupling constants, and polarization observables.
复制标题
Kaon 摄影制作：数据一致性、耦合常数和偏振可观测值。
DOI：
10.1103/physrevc.42.108
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Saghai
中科院分区：
文献类型：
--
作者：
Adelseck;Saghai
用唯象方法研究了过程{gamma}{italp}{rarrow}{italK}{sup +}{Lambda}。一个彻底的分析现有的微分截面数据高达1.4 GeV，考虑到系统的不确定性，显示的奥赛数据是内部不一致的。从数据库中删除这组数据会得到一个相当简单的反应机制，提取的主要K介子-超子-核子耦合常数与SU（3）预测一致。采用图解模型，微分和总截面，{λ}-极化，极化目标数据被很好地再现。对其他单、双偏振观测量的预测和新的测量方法提出了建议。应用交叉对称性，反应与辐射{italK}{sup {minus}}俘获过程有关，并与实测的分支比进行了比较。
The process {gamma}{ital p}{r arrow}{ital K}{sup +}{Lambda} is studied in a phenomenological approach. A thorough analysis of the existing differential cross section data up to 1.4 GeV, taking into account the systematic uncertainties, shows the Orsay data to be internally inconsistent. Removing this data set from the data base results in a rather simple reaction mechanism with the extracted main kaon-hyperon-nucleon coupling constants in agreement with the SU(3) predictions. Employing a diagrammatic model, the differential and total cross section, {Lambda}-polarization, and polarized target data are well reproduced. Predictions for other single and double polarization observables and suggestions for new measurements are presented. Applying crossing symmetry, the reaction is related to the radiative {ital K}{sup {minus}} capture process, and a comparison with the measured branching ratio is made.