Speaker
Description
The existence of astrophysical neutrinos has been firmly established in the past decade. Possible connections of high-energy neutrinos with astrophysical sources have been found by IceCube, and theory studies have been improving in explaining these connections. The recent measurement by Km3Net reporting about an exceptionally high-energy event has contributed to the excitement in the field, and pushed several speculations about its possible origin.
In this contribution I will investigate the cosmogenic origin of the Km3Net event adopting a multimessenger view. I will discuss how cosmogenic neutrinos and gamma rays could help in deciphering the redshift distribution of astrophysical sources of ultra-high-energy cosmic rays, by including also the recent Km3NeT detection. In particular, in order to investigate this, the fraction of protons in the ultra-high-energy cosmic rays will be scrutinised together with the other messengers.