Effects of Majorana Physics on the UHE $\nu_{\tau}$ Flux Traversing the Earth

TL;DR

This paper investigates how sterile Majorana neutrinos influence the tau neutrino flux passing through Earth, using effective theory models and transport equations, with implications for IceCube observations.

Contribution

It introduces a detailed analysis of Majorana neutrino effects on UHE tau neutrino flux considering production, decay, and interactions, extending standard models.

Findings

Majorana neutrinos alter the tau neutrino flux significantly.

Predicted flux variations depend on effective coupling parameters.

Results suggest potential signals for Majorana neutrinos in IceCube data.

Abstract

We study the effects produced by sterile Majorana neutrinos on the $\nu_{\tau}$ flux traversing the Earth, considering the interaction between the Majorana neutrinos and the standard matter as modeled by an effective theory. The surviving tau-neutrino flux is calculated using transport equations including Majorana neutrino production and decay. We compare our results with the pure Standard Model interactions, computing the surviving flux for different values of the effective lagrangian couplings, considering the detected flux by IceCube for an operation time of ten years, and Majorana neutrinos with mass $m_N \thicksim m_{\tau}$.