Electron spectroscopy with PERC

该提案与其他六个优先领域B的提案一起解决了一些粒子物理学前沿的问题，主要强调寻找超越粒子物理学标准模型的新物理学，特别是大爆炸后不久所有力的统一问题。这种大统一不是标准模型的一部分，需要新的对称概念，如左右对称、基本费米子复合、新粒子、轻夸克、超对称等等。利用提议的PERC设施，各种精确的对称性测试都可以实现，与最好的实验相比，中子衰变产物的计数率增加了100倍。我们的目标是ß光谱学，其中新兴衰变粒子的光谱和角分布将在10−4的水平上无畸变。

This proposal together with six other proposals in priority area B addresses a number of questions which are at the forefront of particle physics, with main emphasis on the search for new physics beyond the Standard Model of particles physics, and in particular, on the question of unification of all forces shortly after the Big Bang. This grand unification is not part of the Standard Model, and new symmetry concepts are needed like left-right symmetry, fundamental fermion compositeness, new particles, leptoquarks, supersymmetry, and many more. Precise symmetry tests of various kinds are coming within reach with the proposed facility PERC, where count rates of neutron decay products are increased by a factor 100 compared to best experiments. Our goal is ß spectroscopy, where the spectra and angular distributions of the emerging decay particles will be distortion-free on the level of 10−4.