# Mass and Life Time of Heavy Dark Matter Decaying into IceCube PeV Neutrinos

## TL;DR

This paper constrains the mass and decay lifetime of super heavy dark matter particles by analyzing PeV neutrino events observed by IceCube, using detailed QCD and electroweak corrections in flux calculations.

## Contribution

It provides new constraints on super heavy dark matter properties based on IceCube neutrino data, incorporating advanced theoretical flux modeling with QCD and electroweak effects.

## Key findings

- Dark matter mass around 5 x 10^7 GeV fits IceCube PeV neutrino data.
- Decay lifetime constrained to approximately 7 x 10^28 seconds.
- Supports decay of super heavy dark matter as a source of PeV neutrinos.

## Abstract

Considering that the ultrahigh energy (UHE) upgoing muon neutrino events around the PeV energy region observed by the IceCube are due to the decay of super heavy dark matter to neutrinos, we constrain the mass of the decaying dark matter and its decay lifetime using the IceCube analysis of these neutrinos in the PeV region. The theoretical fluxes are computed by adpoting the procedure given in the reference [1,2], where the DGLAP numerical evolutions of QCD cascades as well as electroweak corrections are included for evolving the decay process of the super heavy dark matter. Our results indicate that to explain the IceCube events around PeV region the decaying dark matter mass $m_\chi$ would be $ \sim 5 \times 10^{7}$ GeV with the decay lifetime $\tau \sim 7 \times 10^{28}$ sec.