论文标题
GEV尺度中微子：与介子和沙丘敏感性的相互作用
GeV-scale neutrinos: interactions with mesons and DUNE sensitivity
论文作者
论文摘要
SM的最简单扩展是考虑到观察到的中微子质量和混合的最简单的延伸是添加了至少两个单身费米子（或右手中微子）。如果它们的群众位于GEV量表上或低于GEV量表，则将在介子腐烂中产生这种新的费米子。同样，只要它们足够沉重，它们的衰减渠道可能涉及最终状态的介子。尽管先前已经计算出介子和重中微子之间的耦合，但文献中可以发现显着差异。本文的目的是阐明这种差异，并为所有涉及群众的相关有效的操作员提供一致的表达，最多2 GEV。此外，为Dirac和Majorana场景获得的有效的Lagrangians作为Feynrules模型公开提供，以便可以轻松模拟完全差异的事件分布。作为我们的设置的应用，我们从数值上计算了探测器附近的沙丘对这些重中性瘦素的预期灵敏度。
The simplest extension of the SM to account for the observed neutrino masses and mixings is the addition of at least two singlet fermions (or right-handed neutrinos). If their masses lie at or below the GeV scale, such new fermions would be produced in meson decays. Similarly, provided they are sufficiently heavy, their decay channels may involve mesons in the final state. Although the couplings between mesons and heavy neutrinos have been computed previously, significant discrepancies can be found in the literature. The aim of this paper is to clarify such discrepancies and provide consistent expressions for all relevant effective operators involving mesons with masses up to 2 GeV. Moreover, the effective Lagrangians obtained for both the Dirac and Majorana scenarios are made publicly available as FeynRules models so that fully differential event distributions can be easily simulated. As an application of our setup, we numerically compute the expected sensitivity of the DUNE near detector to these heavy neutral leptons.
