Propagation in a thermal graviton background

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dc.creatorArteaga, Daniel
dc.creatorParentani, Renaud
dc.creatorVerdaguer, Enric
dc.date2003-11-20
dc.date2004-08-30
dc.date.accessioned2026-07-07T03:28:15Z
dc.date.available2026-07-07T03:28:15Z
dc.descriptionIt is well known that radiative corrections evaluated in nontrivial backgrounds lead to effective dispersion relations which are not Lorentz invariant. Since gravitational interactions increase with energy, gravity-induced radiative corrections could be relevant for the trans-Planckian problem. As a first step to explore this possibility, we compute the one-loop radiative corrections to the self-energy of a scalar particle propagating in a thermal bath of gravitons in Minkowski spacetime. We obtain terms which originate from the thermal bath and which indeed break the Lorentz invariance that possessed the propagator in the vacuum. Rather unexpectedly, however, the terms which break Lorentz invariance vanish in the high three-momentum limit. We also found that the imaginary part, which gives the rate of approach to thermal equilibrium, vanishes at one loop.
dc.description16 pages, 4 figures. This version matches the published paper
dc.identifierhttps://arxiv.org/abs/gr-qc/0311065
dc.identifierhttp://arxiv.org/abs/gr-qc/0311065
dc.identifierPhys.Rev. D70 (2004) 044019
dc.identifierdoi:10.1103/PhysRevD.70.044019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/34760
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titlePropagation in a thermal graviton background
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