从实验数据中提取物理信息的多解性
Multiple solutions in extracting physics information from experimental data
摘要：
当用几个振幅的和来拟合实验测得的分布时，如截面、质谱或角分布，在各种实验情况下都存在多个解。我们展示了几个例子，发现多个解决方案，而只有一个解决方案在出版物中报道。由于在选择这些解中的任何一个作为物理解时没有发现现有的规则，我们提出了一个与以前文献中所采用的一致的简单规则：对应于最小振幅的解必须是物理解。我们建议在以后的实验中检验这一规律。
英文摘要：
Multiple solutions exist in various experimental situations whenever the sum of several amplitudes is used to fit the experimentally measured distributions, such as the cross section, the mass spectrum, or the angular distribution. We show a few examples where multiple solutions were found, while only one solution was reported in the publications. Since there is no existing rules found in choosing any one of these solutions as the physics one, we propose a simple rule which agrees with what have been adopted in previous literatures: the solution corresponding to the minimal magnitudes of the amplitudes must be the physical solution. We suggest test this rule in the future experiments.
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