Center for Relativistic Astrophysics (CRA) - Dr. Ali Keirandish

Abstract

The era of high-energy astrophysics with cosmic neutrinos began with the discovery of high-energy neutrinos with extraterrestrial origin in IceCube. The observation of high-energy cosmic neutrino flux revealed the prominent and larger than expected role of hadronic interactions in the high-energy universe. Neutrinos can escape dense environments, otherwise opaque to photons, and travel cosmic distances unscathed by background radiation or magnetic fields. Therefore, they can provide the smoking gun for the origin of the cosmic rays.  In this talk, I will review the status of the high-energy neutrino astrophysics, will highlight the recent developments achieved via multimessenger observations, and furthermore, discuss the power of neutrino astrophysics in probing for the problems at the intersection of astrophysics , particle physics, and cosmology.