Title: Shannon entropy and particle decays Show Chinese title

Title: 香农熵和粒子衰变

Abstract: We deploy Shannon's information entropy to the distribution of branching fractions in a particle decay. This serves to quantify how important a given new reported decay channel is, from the point of view of the information that it adds to the already known ones. Because the entropy is additive, one can subdivide the set of channels and discuss, for example, how much information the discovery of a new decay branching would add; or subdivide the decay distribution down to the level of individual quantum states (which can be quickly counted by the phase space). We illustrate the concept with some examples of experimentally known particle decay distributions. Show Chinese abstract

Abstract: 我们将香农的信息熵应用于粒子衰变中分支比的分布。 这有助于从它为已知衰变通道增加的信息角度，量化一个新报告的衰变通道的重要性。 由于熵是可加的，可以将通道集进行细分，并讨论例如发现一个新的衰变分支比会增加多少信息；或者将衰变分布细分为单个量子态的水平（可以通过相空间快速计算）。 我们通过一些实验已知的粒子衰变分布的例子来说明这一概念。