Speaker
Antoni Bertólez-Martínez
(Departament de Física Quàntica i Astrofísica, Universitat de Barcelona)
Description
Recently, the KM3NeT collaboration announced the detection of the neutrino with the highest energy ever measured, 220 PeV. Nevertheless, the observation of this event is in 2.5-3.5σ tension with the non-observation of such events in 12 years at IceCube.
In fact, this is not the first anomalous measurement of an ultra-high-energy event. Namely, the ANITA-IV collaboration measured four 1 EeV events, compatible with a tau neutrino, and in strong tension with IceCube.
In this talk I will review under which conditions can BSM (and, in particular, LLPs) reconcile these tensions, and the potential of ultra-high-energy neutrino telescopes at constraining models with LLPs.
Author
Antoni Bertólez-Martínez
(Departament de Física Quàntica i Astrofísica, Universitat de Barcelona)
