快子中微子发射的轻子对切伦科夫辐射：Lorentz协变方法和IceCube数据
Lepton-pair Cerenkov radiation emitted by tachyonic neutrinos: Lorentz-covariant approach and IceCube data
摘要：
目前的实验并不排除一个或多个中微子是非常轻微的超光速或它们具有非常小的快子质量的可能性。假设的快子中微子质量项的大小的重要界限由轻子对切伦科夫辐射（LPCR）设定，即，通过衰变通道nu -> e^+ e^- nu，通过虚Z 0玻色子进行。在这里，我们使用的洛伦兹不变的色散关系，导致非常严格的约束中微子的快子质量，我们还计算衰变和能量损失率。本文讨论了在冰立方中微子谱中出现的一个可能的截止点（E_nu > 2 PeV）。
英文摘要：
Current experiments do not exclude the possibility that one or more neutrinos are very slightly superluminal or that they have a very small tachyonic mass. Important bounds on the size of a hypothetical tachyonic neutrino mass term are set by lepton pair Cerenkov radiation (LPCR), i.e., by the decay channel nu -> e^+ e^- nu which proceeds via a virtual Z0 boson. Here, we use a Lorentz-invariant dispersion relation which leads to very tight constraints on the tachyonic mass of neutrinos; we also calculate decay and energy loss rates. A possible cutoff seen in the IceCube neutrino spectrum for E_nu > 2 PeV, due to the potential onset of LPCR, is discussed.
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