论文标题
通过振幅分析从两极分化的重子衰减中提取最大信息：$λ^+_ c \ to pk^-π^+$ case
Extracting maximum information from polarised baryon decays via amplitude analysis: the $Λ^+_c \to pK^-π^+$ case
论文作者
论文摘要
我们认为，通过在螺旋性形式主义中的振幅分析的偏光baryon衰减的衰减分布中可测量的最大信息。我们特别关注$λ^+_ c \至pk^-π^+$衰减分布的分析研究，这表明可以从其分布中提取有关其衰变幅度的完整信息，从而可以同时测量螺旋度振幅和极化载体。这打开了使用$λ^+_ c \ to pk^-π^+$衰减的可能性，用于从新物理搜索到低能QCD研究，尤其是其用作$λ^+_ c $ baryon的绝对偏光仪。该结果对于具有相同的自旋结构的重子腐烂，并且通过玩具振幅与蒙特卡洛伪data拟合进行数字检查。
We consider which 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 $Λ^+_c \to pK^-π^+$ 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 $Λ^+_c \to pK^-π^+$ decay for applications ranging from New Physics searches to low-energy QCD studies, in particular its use as absolute polarimeter for the $Λ^+_c$ 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 pseudo-data.
