Title: Constraining New Physics with Ultrahigh-Energy Neutrinos
Speaker: Toni Bertólez-Martínez (U. Wisconsin-Madison and WIPAC)
Abstract:
A growing landscape of UltraHigh-Energy (UHE) detectors (IceCube, KM3NeT, ANITA, and future radio and optical telescopes) is opening new windows on physics beyond the Standard Model, probing center-of-mass energies beyond the reach of the LHC. In this talk, I will show how the highest-energy event detected by KM3NeT can be exploited in several complementary ways, and how the synergies between different detectors will improve our sensitivity to new physics. I will introduce how to place a constraint on the neutrino-nucleon cross section, only from the single KM3NeT event; how to use directional information from KM3NeT and ANITA to sharpen the constraints on models with a diffuse dark flux and long-lived particles; and how the KM3NeT event constrains dark matter–neutrino interactions through flux attenuation during propagation.
