https://doi.org/10.1140/epjc/s10052-009-0896-3
Regular Article - Theoretical Physics
Effect of top quark spin on the unparticle couplings in
1
Department of Physics, University of Wisconsin, Madison, WI, 53706, USA
2
Department of Physics, Faculty of Sciences, Ankara University, 06100, Tandogan, Ankara, Turkey
* e-mail: isahin@wisc.edu
** e-mail: isahin@science.ankara.edu.tr
Received:
30
April
2008
Revised:
15
December
2008
Published online:
19
February
2009
We investigate the potential of γ
γ 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 an energy of
TeV. We investigate the effect of the 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.
PACS: 14.80.-j – / 14.65.Ha – / 13.88.+e –
© Springer-Verlag , 2009
