On the Radial Solutions of the Dirac Equation in the Kerr-Newman Black Hole Surrounded by a Cloud of Strings

In this paper, we obtain the metric of space-time generated by a charged and rotating gravitational body surrounded loud strings, namely, Kerr–Newman black hole with addition cloud strings. background, find radial solutions Dirac equation for massive particles show that they are given in terms Generalized Heun functions. The dependence these on parameter codifies presence strings is pointed out.