2016/03/18 by Roberto Aloisio, Aloisio, Roberto
Physics and Astronomy · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1603.05886
8 pages, 8 pdf figures. Invited talk given at the "Cosmic Ray International Seminar" (CRIS 2015), 14-16 September 2015, Gallipoli, Italy
arxiv created 2016/03/18 · arxiv updated 2016/03/21
We discuss the production of ultra high energy neutrinos coming from the propagation of ultra high energy cosmic rays and in the framework of top-down models for the production of these extremely energetic particles. We show the importance of the detection of ultra high energy neutrinos that can be a fundamental diagnostic tool to solve the discrepancy in the observed chemical composition of ultra high energy cosmic rays and, at the extreme energies, can unveil new physics in connection with the recent cosmological observations of the possible presence of tensor modes in the fluctuation pattern of the cosmic microwave background.