T-Odd Gluon-Top-Quark Couplings at LHC

The T-odd top-quark chromoelectric dipole moment, $d_t$, is probed through top-quark-pair production via gluon fusion at the CERN LHC with the possibility of having polarized proton beams in account. At 1-$\sigma$ level, the typical CP-odd lepton energy and tensor correlations enable us to measure $Re(d_t)$ and $Im(d_t)$ up to the order of 10${}^{-18}$ ($g_{s}cm$) in the unpolarized case and the initial CP-odd gluon spin correlation allows us to probe $Im(d_t)$ up to the order of 10${}^{-20}$ ($g_{s}cm$) for $\sqrt{s}=14$ TeV and the integrated luminosity $L_{pp}=10f{b}^{-1}$.