A variety of new physics models allows for neutrinos to up-scatter into heavier states. If the incident neutrino is energetic enough, the heavy neutrino may travel some distance before decaying. In this work, we consider the atmospheric neutrino flux as a source of such events. At IceCube, this would lead to a “double-bang” (DB) event topology, similar to what is predicted to occur for tau neutrinos at ultrahigh energies. The DB event topology has an extremely low background rate from coincident atmospheric cascades, making this a distinctive signature of new physics. Our results indicate that IceCube should already be able to derive new competitive constraints on models with GeV-scale sterile neutrinos using existing data.

中文翻译：

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Icecube中新物理学的双级联事件

各种新的物理模型允许中微子向上散射到更重的状态。如果入射中微子具有足够的能量，则重中微子可能会在衰变之前传播一段距离。在这项工作中，我们认为大气中微子通量是此类事件的来源。在IceCube，这将导致“双爆炸”（DB）事件拓扑，类似于超高能中tau中微子的预测拓扑。DB事件拓扑由于同时发生的大气级联而具有极低的背景速率，这使其成为新物理学的独特标志。我们的结果表明，IceCube应该已经能够使用现有数据对具有GeV级无菌中微子的模型得出新的竞争约束。