期刊
PHYSICS LETTERS B
卷 780, 期 -, 页码 246-250出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2018.03.017
关键词
Quantum gravity phenomenology; Lateshift; Modified dispersion relation; Lorentz invariance violations
资金
- European Regional Development Fund through the Center of Excellence The Dark Side of the Universe [TK133]
Observables which would indicate a modified vacuum dispersion relations, possibly caused by quantum gravity effects, are a four momentum dependence of the cosmological redshift and the existence of a so called lateshift effect for massless or very light particles. Existence or non-existence of the latter is currently analyzed on the basis of the available observational data from gamma-ray bursts and compared to predictions of specific modified dispersion relation models. We consider the most general perturbation of the general relativistic dispersion relation of freely falling particles on homogeneous and isotropic spacetimes and derive the red- and lateshift to first order in the perturbation. Our result generalizes the existing formulae in the literature and we find that there exist modified dispersion relations causing both, one or none of the two effects to first order. (C) 2018 The Author(s). Published by Elsevier B.V.
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