Effect of top quark spin on the unparticle couplings in γγ\to t\bar{t}
Abstract
Description
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 $\sqrt{s}=1$ 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.
6 figures and 4 tables, limits for d_U=1.7 and 1.9 have been added, published version
6 figures and 4 tables, limits for d_U=1.7 and 1.9 have been added, published version