论文标题
中微子双β衰减在山脉：主要州之间的干扰
Neutrinoless double-beta decay at colliders: interference between Majorana states
论文作者
论文摘要
重中性瘦素（HNL）是假设的颗粒，能够解释几种基本物理学的难题，这是首先和最重要的中微子振荡。这些颗粒在标准模型相互作用方面是无菌的，因此允许违反整个Lepton数量。因此，Lepton数字违反（LNV）过程成为许多实验所追求的HNL的关键签名。在这项工作中，我们证明，如果HNL是中微子质量的唯一起源，那么Maporana状态之间的破坏性干扰会抑制同一符号Di-Lepton信号。在大型HNL耦合的现象学有趣的情况下，这种抑制类似于取消HNLS对中微子质量的贡献。然而，信号可能比仅来自温伯格操作员的信号大得多。我们确定了这种现实的HNL模型的参数空间区域，其中LNV信号在LHC和Future FCC-HH上最大化。我们的结果是在有效的W近似中获得的，该近似允许进行分析处理，并明确依赖模型参数。尽管大概是在少数倍以内，但它们被认为是正确的。
Heavy neutral leptons (HNLs) are hypothetical particles able to explain several puzzles of fundamental physics, first and foremost - neutrino oscillations. Being sterile with respect to Standard Model interactions, these particles admit Majorana masses, allowing for violation of the total lepton number. Lepton number violating (LNV) processes thus become a key signature of HNLs, pursued by many experiments. In this work, we demonstrate that if HNLs are the sole origin of neutrino masses, destructive interference between Majorana states suppresses the same-sign di-lepton signal. In the phenomenologically interesting case of large HNL couplings, such suppression is akin to the cancellation of HNLs' contributions to neutrino masses. Nevertheless, the signal can be much larger than coming from the Weinberg operator alone. We identify regions of the parameter space of such realistic HNL models where the LNV signal is maximised at the LHC and future FCC-hh. Our results are obtained within the effective W approximation which allows for analytic treatment and gives a clear dependence on the model parameters. Although approximate, they are argued to be correct within a factor of a few.
