CONICET | Buscador de Institutos y Recursos Humanos

We study the impact of unparticle physics to the chromomagnetic dipole moment (CMDM) ofthe top quark. We compute the effect induced by unparticle operators of scalar and vector naturecoupled to fermions on the CMDM. We find that this dipole moment is sensitive to the scaledimensions du of the unparticle and the new couplings of the respective effective operators. Usingthe bounds imposed on the CMDM by low-energy precision and Tevatron measurements we deriveindirect limits on the unparticle parameter space. In particular, we find that the scalar-unparticleoperator contribution fulfills both constraints for most of the unparticle parameter space, whilethe low-energy precision bound on the CMDM excludes a vector-unparticle contribution for lowvalues of respective scale dimension du .