Probing sterile neutrinos with exotic interactions

我们将探讨在奇异相互作用的存在下，即超越与SM中微子的质量混合对不育中微子的约束。这将采取的形式EFT分析的SM，包括不育中微子的质量高达电弱标度。目标是全面了解现有的限制和未来的测量潜力，如中微子质量（无中微子双β衰变，氚衰变）和宇宙中微子背景。该项目将与由Deppisch监督的博士项目（2019-23）一起进行，该项目涉及数据驱动的方法，以改善无中微子双β衰变核矩阵元素，由UCL数据密集科学的STFC CDT资助。经过初步培训，学生将：应用参数推断的统计技术，并对当前和未来的中微子质量测量进行更新的全局拟合（Y1）;开发一个具有有效算子的无菌中微子的EFT框架，并将其与可观测量联系起来（Y2）;详细分析对无菌中微子的限制，以及最有前途的未来测量的潜力，重点是修改由于外来的相互作用（Y3）。

We will explore the constraints on sterile neutrinos under the presence of exotic interactions, i.e. beyond the mass mixing with the SM neutrinos. This will take the form of an EFT analysis of the SM including sterile neutrinos with masses up to the electroweak scale. The goal is a comprehensive picture of existing constraints and the future potential of measurements such as of the neutrino mass (neutrinoless double beta decay, Tritium decay) and the cosmic neutrino background. The project will be conducted alongside a PhD project (2019-23), supervised by Deppisch, on data-driven methods to improve neutrinoless double beta decay nuclear matrix elements, funded by the STFC CDT in Data Intensive Science at UCL. After initial training, the student will: apply statistical techniques of parameter inference and perform an updated global fit of current and prospective neutrino mass measurements (Y1); develop an EFT framework with sterile neutrinos with effective operators and connect these to observables (Y2); analyse in detail the constraints on sterile neutrinos as well as the potential of the most promising future measurements with a focus on modifications due to exotic interactions (Y3).