English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the present paper, it is assumed that there exist two species of darkmatter: a heavy dark matter particle (HDM) with the mass of O(TeV) which isgenerated in early universe and a lighter dark matter particle (LDM) which is arelativistic product due to the decay of HDM. HDMs, captured by the earth,decay to high energy LDMs, and these particles can be measured by km$^3$neutrino telescopes, like the IceCube detector. A $Z^{\prime}$ portal darkmatter model is taken for LDMs to interact with nuclei via a neutral currentinteraction mediated by a heavy gauge boson $Z^{\prime}$. With the differentlifetimes of decay of HDMs and Z$^{\prime}$ masses, the event rates of LDMs,measured by IceCube, are evaluated in the energy range between 1 TeV and 100TeV. According to the IceCube data, the upper limit for LDM fluxes is estimatedat 90\% C.L. at IceCube. Finally, it is proved that LDMs could be directlydetected in the energy range betwen O(1TeV) and O(10TeV) at IceCube with$m_{Z^{\prime}} \lesssim 500 GeV$ and $\tau_{\phi} \lesssim 10^{21}$ s.

Measurement of TeV dark particles due to decay of heavy dark matter in the earth core at IceCube