We consider what is the maximum information measurable from the decay distributions of polarised baryon decays via amplitude analysis in the helicity formalism. We focus in particular on the analytical study of the decay distributions, demonstrating that the full information on its decay amplitudes can be extracted from its distributions, allowing a simultaneous measurement of both helicity amplitudes and the polarisation vector. This opens the possibility to use the decay for applications ranging from New Physics searches to low-energy QCD studies, in particular its use as absolute polarimeter for the baryon. This result is valid as well for baryon decays having the same spin structure, and it is cross-checked numerically by means of a toy amplitude fit with Monte Carlo pseudodata.

中文翻译：

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通过振幅分析从极化的重子衰减中提取最大信息

我们考虑通过螺旋形式论中的振幅分析，从极化的重子衰变的衰变分布可测得的最大信息是什么。我们特别专注于对衰减分布，表明可以从其分布中提取有关其衰减幅度的全部信息，从而可以同时测量螺旋度和极化矢量。这打开了使用从“新物理学”搜索到低能QCD研究，尤其是其用作重子的绝对旋光仪的应用，它的衰变性能。该结果对于具有相同自旋结构的重子衰变也是有效的，并且通过与蒙特卡洛伪数据拟合的玩具振幅对它进行了数字交叉检查。