Unparticle Decay of Neutrinos and its Possible Signatures at a ${\rm Km}^2$ Detector for (3+1) Flavour Framework

TL;DR

This paper investigates how ultra high energy neutrinos might decay into unparticles during their journey from distant sources to Earth, and how such decays could be detected by large-scale neutrino observatories like IceCube.

Contribution

It introduces a novel scenario of neutrino decay into unparticles within a (3+1) flavor framework and explores potential observational signatures at km^2 detectors.

Findings

Potential signatures of unparticle decay at IceCube.

Implications for high-energy neutrino observations.

Extension of unparticle physics to neutrino astrophysics.

Abstract

We consider a scenario where ultra high energy neutrinos undergo unparticle decay during its passage from its cosmological source to Earth. The idea of unparticle had been first proposed by Georgi by considering the possible existence of an unknown scale invariant sector at high energies and the unparticles in this sector manifest itself below a dimensional transmutation scale $\Lambda_{\cal U}$. We then explore the possible signature of such decaying neutrinos to unparticles at a square kilometer detector such as IceCube.