Discriminating and Constraining the Synchrotron and Inverse Compton
  Radiations from Primordial Black Hole and Dark Matter at the Galactic Centre
  Region
  The evaporations of Primordial Black Holes (PBH) (via Hawking radiation) can
produce electrons/positrons ($e^-/e^+$) in the Galactic Centre (GC) region
which under the influence of the magnetic field of Centre region can emit
synchrotron radiation. These $e^-/e^+$ can also induce Inverse Compton
radiation due to the scattering with ambient photons. In this work three
different PBH mass distributions namely, monochromatic, power law and lognormal
distributions are considered to calculate such radiation fluxes. On the other
hand, annihilation or decay of dark matter in the Galactic Centre region can
also yield $e^-/e^+$ as the end product which again may emit synchrotron
radiation in the Galactic magnetic field and also induce Inverse Compton
scattering. In this work a comparative study is made for these radiation fluxes
from both PBH evaporations and from dark matter origins and their
detectabilities are addressed in various ongoing and other telescopes as well
as in upcoming telescopes such as SKA. Moreover, constraints on the model
parameters are obtained from these experimental predictions. The variations of
these radiation fluxes with the distance from the Galactic Centre are also
computed and it is found that such variations could be a useful probe to
determine the mass of PBH or the mass of dark matter.
