The IceCube neutrino discovery was punctuated by three showers with $E_{\nu }\approx 1–2\mathrm{PeV}$. Interest is intense in possible fluxes at higher energies, though a deficit of $E_{\nu }\approx 6\mathrm{PeV}$ Glashow resonance events implies a spectrum that is soft and/or cutoff below $\sim \text{few}$ PeV. However, IceCube recently reported a through-going track depositing $2.6\pm 0.3\mathrm{PeV}$. A muon depositing so much energy can imply $E_{{\nu }_{\mu }}\gtrsim 10\mathrm{PeV}$. Alternatively, we find a tau can deposit this much energy, requiring $E_{{\nu }_{\tau }}\sim 10\times$ higher. We show that extending soft spectral fits from TeV-PeV data is unlikely to yield such an event, while an $\sim E_{\nu }^{-2}$ flux predicts excessive Glashow events. These instead hint at a new flux, with the hierarchy of ${\nu }_{\mu }$ and ${\nu }_{\tau }$ energies implying astrophysical neutrinos at $E_{\nu }\sim 100\mathrm{PeV}$ if a tau. We address implications for ultrahigh-energy cosmic-ray and neutrino origins.

中文翻译：

---

来自Glashow共振的新型天体中微子通量产生的多PeV信号

IceCube中微子的发现被3次阵雨打断了 $E_{\nu }\approx \mathrm{1个}–\mathrm{2个}\mathrm{乙肝病毒}$。尽管能量不足，但人们对高能量下可能的通量的兴趣很强。$E_{\nu }\approx 6\mathrm{乙肝病毒}$ Glashow共振事件暗示一个低于和/或截止的光谱 $〜\text{很少}$PeV。但是，IceCube最近报告了正在进行的跟踪存放$2.6\pm 0.3\mathrm{乙肝病毒}$。介子会沉积大量能量，这可能意味着$E_{{\nu }_{\mu }}\gtrsim 10\mathrm{乙肝病毒}$。另外，我们发现tau可以储存这么多的能量，需要$E_{{\nu }_{\tau }}〜10\times$更高。我们显示，从TeV-PeV数据扩展软光谱拟合不太可能产生此类事件，而$〜E_{\nu }^{-\mathrm{2个}}$通量预测过多的Glashow事件。这些反而暗示着一种新的变化，具有层次结构${\nu }_{\mu }$ 和 ${\nu }_{\tau }$ 暗示天体中微子的能量 $E_{\nu }〜100\mathrm{乙肝病毒}$如果是头 我们解决了对超高能宇宙射线和中微子起源的影响。