High Energy Physics - Phenomenology
[Submitted on 11 Aug 2015 (v1), last revised 21 Oct 2015 (this version, v3)]
Title:IceCube Events from Heavy DM decays through the Right-handed Neutrino Portal
View PDFAbstract:The recently observed IceCube PeV events could be due to heavy dark matter (DM) decay. In this paper, we propose a simple DM model with extra $U(1)_X$ gauge symmetry and bridge it with standard model particles through heavy right-handed neutrino. The Dirac fermion DM $\chi$ with mass ~5 PeV can dominantly decay into a dark Higgs ($\phi$), the SM Higgs ($h$) and a neutrino ($\nu$). If the lifetime of $\chi$ is ~O($10^{28}$) sec, the resulting neutrino flux can fit data consistently. The neutrino flux from $\chi \rightarrow \phi h \nu$ in our model is softer than the one predicted from $\chi \rightarrow \nu h$, for example. We also discuss a possible mechanism to produce DM with the right relic abundance.
Submission history
From: Yong Tang [view email][v1] Tue, 11 Aug 2015 07:33:28 UTC (759 KB)
[v2] Mon, 17 Aug 2015 14:21:34 UTC (760 KB)
[v3] Wed, 21 Oct 2015 00:49:06 UTC (901 KB)
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