110 citations · 130 across the 7 of their papers we have counts for
5 papers · 1 filter
Fermion scattering by a Schwarzschild black hole
Sam Dolan, Chris Doran, Anthony Lasenby
We study the scattering of massive spin-half waves by a Schwarzschild black hole using analytical and numerical methods. We begin by extending a recent perturbation theory calculat…
Analytic solutions to Riemann-squared gravity with background isotropic torsion
A. N. Lasenby, C. J. L. Doran, R. Heineke
Motivated by conventional gauge theories, we consider a theory of gravity in which the Einstein-Hilbert action is replaced by a term that is quadratic in the Riemann tensor. We foc…
Fermion absorption cross section of a Schwarzschild black hole
Chris Doran, Anthony Lasenby, Sam Dolan +1
We study the absorption of massive spin-half particles by a small Schwarzschild black hole by numerically solving the single-particle Dirac equation in Painleve-Gullstrand coordina…
Gravity, Gauge Theories and Geometric Algebra
Anthony Lasenby, Chris Doran, Stephen Gull
A new gauge theory of gravity is presented. The theory is constructed in a flat background spacetime and employs gauge fields to ensure that all relations between physical quantiti…
Integral equations, Kerr-Schild fields and gravitational sources
Chris Doran, Anthony Lasenby
Kerr-Schild solutions to the vacuum Einstein equations are considered from the viewpoint of integral equations. We show that, for a class of Kerr-Schild fields, the stress-energy t…