SUSY Renormalization Group Effects in Ultra High Energy Neutrinos

TL;DR

This paper investigates whether the renormalization group effects on neutrino mixing parameters in the MSSM can be detected through ultra-high energy neutrinos from AGN, but finds detection unlikely due to low event rates.

Contribution

It analyzes the potential observability of SUSY renormalization effects on neutrino flux ratios from AGN using high-energy neutrino detectors.

Findings

Detection requires a high momentum transfer cut-off of Q^2 ≥ 10^7 GeV^2.

Expected low flux results in negligible event rates at IceCube.

Renormalization effects are challenging to observe with current detector capabilities.

Abstract

We have explored the question of whether the renormalization group running of the neutrino mixing parameters in the Minimal Supersymmetric Standard Model is detectable with ultra-high energy neutrinos from active galactic nuclei (AGN). We use as observables the ratios of neutrino fluxes produced at the AGN, focusing on four different neutrino production models: $(\Phi_{\nu_e+\bar{\nu}_e}^0 : \Phi_{\nu_\mu+\bar{\nu}_\mu}^0 : \Phi_{\nu_\tau+\bar{\nu}_\tau}^0)$ = (1:2:0), (0:1:0), (1:0:0), and (1:1:0). The prospects for observing deviations experimentally are taken into consideration, and we find out that it is necessary to impose a cut-off on the transferred momentum of $Q^2 \geq 10^7$ GeV$^2$. However, this condition, together with the expected low value of the diffuse AGN neutrino flux, yields a negligible event rate at a km-scale Cherenkov detector such as IceCube.