Topics in Theoretical Physics

我们建议研究理论物理中的一些主题。其中一个涉及违反时间反转对称性的起源，这是物理学中最大的谜团之一，并在K介子的衰变中观察到。这种违规行为的性质还没有得到很好的理解。K介子的一种特殊的罕见衰变对时间反转破坏非常敏感，但很难探测到。最近，人们意识到，可以在TUNAF或BNL测量到这一点。我们计划在各种粒子相互作用模型中计算衰减率。另一个话题是关于中微子在中子核上的散射，中微子正向产生的质子比人们预期的要多。这通常被归因于重氢核中的再散射。相对论效应也会影响预期，我们希望确定这些影响的大小。这是确定中微子与中子和质子反应速率的最大不确定性。还有一个话题与粒子物理学中一个基于超对称性的流行理论有关。尽管超对称性预测的大多数新粒子都很重，但仍有可能有一个胶子是轻的，可以在TUNAF和/或BNL探测到。我们之前已经检查过这一点，并将与计划中的搜索者的实验人员密切合作。

We propose to investigate a number of topics in theoretical physics. One concerns the origin of the violation of time- reversal symmetry, one of the greatest mysteries in physics, and observed in decays of the K-meson. The nature of this violation isn't well understood. A particular rare decay of the K-meson is extremely sensitive to time-reversal violation, but is very difficult to detect. Recently, it has been realized that it may be measurable at TUNAF or BNL. We plan to calculate the decay rate in a wide variety of models of particle interactions. Another topic concerns neutrinos scattering off the deuteron, where more protons are produced in the forward direction than one expects. This is often attributed to rescattering in the deuterium nucleus. Relativistic effects also affect the expectations, and we wish to determine the size of these effects. This is the largest uncertainty in determining the reaction rate of neutrinos off neutrons and protons. Still another topic concerns a popular theory in particle physics, based on supersymmetry. Although most new particles predicted by supersymmetry are very heavy, there remains the possibility that one, the gluino, is light, and detectable at TUNAF and/or BNL. We've examined this previously and will work closely with experimenters in planned searchers.