  We investigate the electrostatic confinement of charge carriers in a gapped
graphene quantum dot in the presence of a magnetic flux. The circular quantum
dot is defined by an electrostatic gate potential delimited in an infinite
graphene sheet which is then connected to a two terminal setup. Considering
different regions composing our system, we explicitly determine the solutions
of the energy spectrum in terms of Hankel functions. Using the scattering
matrix together with the asymptotic behavior of the Hankel functions for large
arguments, we calculate the density of states and show that it has an
oscillatory behavior with the appearance of resonant peaks. It is found that
the energy gap can controls the amplitude and width of these resonances and
affect their location in the density of states profile.
