Heavy decaying dark matter at future neutrino radio telescopes

Abstract

In the next decades, ultra-high-energy neutrinos in the EeV energy range will be potentially detected by next-generation neutrino telescopes. Although their primary goals are to observe cosmogenic neutrinos and to gain insight into extreme astrophysical environments, they can also indirectly probe the nature of dark matter. In this paper, we study the projected sensitivity of up-coming neutrino radio telescopes, such as RNO-G, GRAND and IceCube-gen2 radio array, to decaying dark matter scenarios. We investigate different dark matter decaying channels and masses, from 107 to 1015 GeV. By assuming the observation of cosmogenic or newborn pulsar neutrinos, we forecast conservative constraints on the lifetime of heavy dark matter particles. We find that these limits are competitive with and highly complementary to previous multi-messenger analyses.

Filtered asymmetric dark matter during the Peccei-Quinn phase transition

“…Therefore, as obtained from eq. (4.25), for E v l ∼ m N = 1 PeV, the cross section is compatible with the bound on DM annihilation processes [66].…”

Constraints on heavy decaying dark matter with current gamma-ray measurements

“…To conclude this section, we compare the result of this work with the current lifetime limits placed by neutrino observations and also the future radio telescopes projected ones obtained in our previous work [40]. This comparison is done in Fig.…”

Testing the stability of heavy dark matter with up-coming radio neutrino telescopes

“…For a more detailed explanation of the analysis performed we refer the reader to [7], where more information about the methods used could be found.…”

“…In this work [7] we have used the future neutrino radio telescopes RNO-G [8], IceCube-Gen2 radio array [9,10] and GRAND [11] in order to explore the parameter space of heavy dark matter particles with masses in the range [10 7 − 10 15 ] GeV, focusing on the decay rather than in the annihilation due to the higher produced neutrino fluxes. We will assume that the neutrino telescopes will measure only the cosmogenic neutrino contribution or the newborn pulsars one and extract in this way the limits that we could place on the lifetime of the dark matter particles using the projected sensitivities of the aforementioned telescopes.…”