Particle Acceleration in Rotating Modified Hayward and Bardeen Black Holes

We consider a rotating modified Hayward black hole and construct a rotating modified Bardeen black hole to study particle acceleration of two colliding particles near the horizon. These classes of black holes have new and important parameters with mass dimension, which made crucial differences with the Kerr black hole. We investigate the CM energy of two colliding neutral particles with the same rest masses falling from rest at infinit to near the horizons of the mentioned black holes. We confirm that rotational motion of these black holes is necessary to have infinite CM energy for collision of two particles near the horizon. We also investigate the range of the particles' angular momentum and the orbit of the particle, hence find an infinite region for the case of rotating modified Bardeen black hole and a finite region for the case of a modified Hayward black hole.