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Heavy quarks, namely, the top and bottom quarks, may show great sensitivenessto new physics effects. In particular, they might have unusually large electricdipole moments. This possibility is analyzed via the corresponding one-loopcorrection to the neutron electric dipole moment, $d_n$. The currentexperimental limit on $d_n$ is used then to derive the uppers bounds$|d_t|<3.06\times 10^{-15}$ e-cm, $|d_b|<1.22\times 10^{-13}$ e-cm.

Bounding the top and bottom electric dipole moments from neutron experimental data