论文标题
辐射muon捕获的内部正电子的高能量光谱在原子核上
The high energy spectrum of internal positrons from radiative muon capture on nuclei
论文作者
论文摘要
MU2E和彗星的合作将搜索核催化的MUON转换为poSitrons（$μ^ - \ rightarrow e^+$），作为Lepton数字违规的信号。此搜索的关键背景是辐射粘合捕获，其中要么：1）真实的光子在周围材料中转换为$ e^+ e^ - $对“外部”，或2）虚拟光子介导了$ e^+ e^ - $ $对“内部”的产生。如果$ e^+$具有接近信号区域的能量，则可以用作不可约的背景。在这项工作中，我们描述了近终点内部正电子光谱如何与来自同一核的真实光子光谱有关，该核编码所有非平凡的核物理学。
The Mu2e and COMET collaborations will search for nucleus-catalyzed muon conversion to positrons ($μ^-\rightarrow e^+$) as a signal of lepton number violation. A key background for this search is radiative muon capture where either: 1) a real photon converts to an $e^+ e^-$ pair "externally" in surrounding material, or 2) a virtual photon mediates the production of an $e^+e^-$ pair "internally". If the $e^+$ has an energy approaching the signal region then it can serve as an irreducible background. In this work we describe how the near end-point internal positron spectrum can be related to the real photon spectrum from the same nucleus, which encodes all non-trivial nuclear physics.
