On the Decay of Unparticles

TL;DR

This paper investigates how unparticles, when coupled to the Standard Model, can decay into Standard Model particles, significantly altering their experimental signatures and providing a method to calculate their decay lifetimes.

Contribution

It introduces a novel method for calculating unparticle decay lifetimes and explores their varied experimental manifestations based on lifetime.

Findings

Unparticles can decay into Standard Model particles when coupled.

Decay lifetimes influence observable signals like monojets, delayed events, or prompt decays.

The study provides a framework for predicting unparticle signatures in experiments.

Abstract

We show that when the unparticle sector is coupled to the Standard Model, unparticle excitations can decay to Standard Model particles. This radically modifies the signals of unparticle production. We present a method for the calculation of the decay lifetimes of unparticles. In a particular model, we show that depending on their lifetime, unparticles can manifest themselves through monojets, delayed events or prompt decays.