Chromomagnetic and chromoelectric dipole moments in the 4GTHDM

The contributions to the chromomagnetic (CMDM) and chromoelectric (CEDM) dipole moments of the top quark are calculated in framework of the two-Higgs doublet model with a sequential fourth family. We only consider the contributions arising from the neutral scalar bosons H ⁰ and A ⁰, whereas the contribution of the charged scalar will be analyzed elsewhere. For the scalar boson masses we consider the degenerate case, with 200 GeV < m_ϕ < 500 GeV, while for the mass of the fourth family up quark we consider the interval 400 GeV < m _t4 < 600 GeV. It is found that the CMDM and CEDM are specially sensitive when m_ϕ is about 600 GeV and can reach the sizes of | a_t | ∼ 10⁻⁵ and | d_t | ∼ 10⁻²⁴ e cm, respectively. (paper)