Unparticle Searches Through Gamma Gamma Scattering

TL;DR

This paper explores how hypothetical unparticles could influence gamma gamma scattering at future high-energy colliders, providing potential signals for new physics beyond the Standard Model.

Contribution

It presents a detailed analysis of unparticle effects on gamma gamma scattering cross sections, including polarization effects and setting bounds on unparticle couplings.

Findings

Unparticle effects significantly alter scattering cross sections.

Upper limits on unparticle-photon couplings are established.

Analysis covers a range of collider energies from 0.5 to 5 TeV.

Abstract

We investigate the effects of unparticles on gamma gamma--> gamma gamma scattering for photon collider mode of the future multi-TeV e^+e^- linear collider. We show the effects of unparticles on the differential, and total scattering cross sections for different polarization configurations. Considering 1-loop Standard Model background contributions from the charged fermions, and W^{+-} bosons to the cross section, we calculate the upper limits on the unparticle couplings lambda_0 to the photons for various values of the scaling dimension d(1<d<2) at sqrt{s}=0.5-5 TeV.