Spectral Decline of PeV Neutrinos from Starburst Galaxies

Understand

Starburst galaxies represent one of the most plausible origins of the cosmic high-energy neutrino flux recently discovered by IceCube.

• At $\sim$ PeV energies, the neutrino flux from starburst galaxies is expected to exhibit a characteristic spectral break due to cosmic-rays escaping the galaxy.
• We examine the 'smearing' of this spectral break by a population of starburst galaxies with varying properties.
• We incorporate galaxy distribution w.r.t.