1112.4683 (Hyeyoun Chung)

Low Energy Dynamics of Near-Extremal Black Holes in N=2, d=4
Supergravity    [PDF]

Hyeyoun Chung

We study the scattering and emission of probe particles from a near-extremal
D0-D4 black hole in N=2, d=4 supergravity, when the parameters of the black
hole solution lie within a certain regime. We first carry out a qualitative
analysis of the probe potential to determine when quantum tunneling of
particles from the black hole is possible. We then compute the absorption
cross-section in the case of relatively high-energy scattering, when the energy
of the emitted particle is close to the maximum value of the probe potential.
Finally, we use the WKB approximation to compute the absorption cross-section
and greybody factors for arbitrary energies for the scattered particle.

View original: http://arxiv.org/abs/1112.4683