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Galaxies 2015, 3(2), 72-83; doi:10.3390/galaxies3020072

Perspectives on Gravity-Induced Radiative Processes in Astrophysics

Department of Physics and Prairie Particle Physics Institute, University of Regina, Regina,Sask S4S 0A2, Canada
Academic Editor: Lorenzo Iorio
Received: 9 February 2015 / Revised: 8 April 2015 / Accepted: 8 April 2015 / Published: 16 April 2015
(This article belongs to the Special Issue Advances in Gravitational Research)
View Full-Text   |   Download PDF [324 KB, uploaded 16 April 2015]   |  

Abstract

Single-vertex Feynman diagrams represent the dominant contribution to physical processes, but are frequently forbidden kinematically. This is changed when the particles involved propagate in a gravitational background and acquire an effective mass. Procedures are introduced that allow the calculation of lowest order diagrams, their corresponding transition probabilities, emission powers and spectra to all orders in the metric deviation, for particles of any spin propagating in gravitational fields described by any metric. Physical properties of the “space-time medium” are also discussed. It is shown in particular that a small dissipation term in the particle wave equations can trigger a strong back-reaction that introduces resonances in the radiative process and affects the resulting gravitational background. View Full-Text
Keywords: gravitational Berry phase; radiative processes in gravitation; optical properties of space-time; covariant wave equations; gravitational effects gravitational Berry phase; radiative processes in gravitation; optical properties of space-time; covariant wave equations; gravitational effects
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Papini, G. Perspectives on Gravity-Induced Radiative Processes in Astrophysics. Galaxies 2015, 3, 72-83.

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