Unparticle Searches Through Low Energy Parity Violating Asymmetry

TL;DR

This paper investigates how unparticles could influence low-energy electron-electron scattering asymmetry and uses experimental data to set limits on unparticle parameters.

Contribution

It provides the first constraints on unparticle couplings and energy scales derived from low-energy parity-violating asymmetry measurements.

Findings

Limits on unparticle coupling $\lambda_{AV}$ established

Bounds on energy scale $\Lambda$ derived for various $d$ values

Experimental data constrains unparticle models at 95% C.L.

Abstract

In this paper, we study the effects of the unparticles on the parity-violating asymmetry for the low energy electron-electron scattering, $e^-e^-\to e^-e^-$. Using the data from the E158 experiment at SLAC we extract the limits on the unparticle coupling $\lambda_{AV}$, and on the the energy scale $\Lambda$ at 95% C.L. for various values of the scaling dimension $d$.