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- W4297798980 abstract "Discovering neutrino decay would be strong evidence of physics beyond the Standard Model. Presently, there are only lax lower limits on the lifetime $tau$ of neutrinos, of $tau/m sim 10^{-3}$ s eV$^{-1}$ or worse, where $m$ is the unknown neutrino mass. High-energy cosmic neutrinos, with TeV-PeV energies, offer superior sensitivity to decay due to their cosmological-scale baselines. To tap into it, we employ a promising method, recently proposed, that uses the Glashow resonance $bar{nu}_e + e to W$, triggered by $bar{nu}_e$ of 6.3 PeV, to test decay with only a handful of detected events. If most of the $nu_1$ and $nu_2$ decay into $nu_3$ en route to Earth, no Glashow resonance would occur in neutrino telescopes, because the remaining $nu_3$ have only a tiny electron-flavor content. We turn this around and use the recent first detection of a Glashow resonance candidate in IceCube to place new lower limits on the lifetimes of $nu_1$ and $nu_2$. For $nu_2$, our limit is the current best. For $nu_1$, our limit is close to the current best and, with the imminent detection of a second Glashow resonance, will vastly surpass it." @default.
- W4297798980 created "2022-10-01" @default.
- W4297798980 creator A5075145457 @default.
- W4297798980 date "2020-04-14" @default.
- W4297798980 modified "2023-10-14" @default.
- W4297798980 title "New limits on neutrino decay from the Glashow resonance of high-energy cosmic neutrinos" @default.
- W4297798980 doi "https://doi.org/10.48550/arxiv.2004.06844" @default.
- W4297798980 hasPublicationYear "2020" @default.
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