Using the decay $b\to s\gamma$ to bound the chromomagnetic dipole moment   of the top quark
  Using the CLEO data for $b\to s\gamma$, we constrain the chromomagnetic dipole moment of the top quark within the context of a decoupling effective Lagrangian approach. Our results are in agreement with the results obtained for the $e^+e^-$ and hadron colliders. 
R. Mart\'inez and J-Alexis Rodr\'iguez, (Universidad Nacional, Bogota,   Colombia)