Effect of top quark spin on the unparticle couplings in \gamma\gamma \to t\bar{t}

TL;DR

This paper explores how top quark spin polarization in gamma-gamma collisions can enhance the detection sensitivity of scalar unparticle couplings through top-antitop production, providing improved limits at high energy colliders.

Contribution

It introduces the impact of top quark spin polarization on probing scalar unparticle couplings in gamma-gamma collisions, showing significant sensitivity improvements.

Findings

Spin polarization improves sensitivity limits for unparticle couplings.

95% confidence level limits are established at 1 TeV energy.

Top quark spin effects are significant in unparticle coupling detection.

Abstract

We investigate the potential of $\gamma\gamma$ collisions to probe scalar unparticle couplings via top-antitop quark pair production. We find 95% confidence level limits on the unparticle couplings with an integrated luminosity of $500 fb^{-1}$ and $\sqrt{s}=1$ TeV energy. We investigate the effect of top quark spin polarization on the unparticle couplings. It is shown that spin polarization of the top quark leads to a significant improvement in the sensitivity limits.