Effect of top quark spin on the unparticle couplings in γγ tt
Abstract
We investigate the potential of γγ 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 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.
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