4 papers
Quantum Scattering in Schwarzschild Spacetime: Hawking Radiation and Black Hole Atmospheres
Victor H. Alencar, Gabriel Picanço, Carlos A. D. Zarro
In this paper, we investigate scattering of a scalar field near a Schwarzschild black hole through its -matrix. Within this framework, we obtain a novel derivation of Hawking ra…
Limits on the Carroll-Field-Jackiw electrodynamics from geomagnetic data
G. F. de Carvalho, M. Fillion, P. C. Malta +1
Lorentz-symmetry violation may be described via the CPT-odd, dimension-3, Carroll-Field-Jackiw term, which couples the electromagnetic fields to a constant 4-vector se…
Experimental signatures of Kalb-Ramond-like particles
P. C. Malta, J. P. S. Melo, C. A. D. Zarro
We analyse phenomenological signatures of Kalb-Ramond-like particles, described by an antisymmetric rank-2 tensor, when coupled to fermionic matter. The latter is modelled by a ten…
Bounds on the photon mass via the Shapiro effect in the solar system
P. C. Malta, C. A. D. Zarro
We study the effects of a finite mass for the photon on its propagation in a weak gravitational field. In particular, we analyse the gravitational time delay, also known as the Sha…