Rainbows without unicorns: metric structures in theories with modified dispersion relations

Lobo, Larley P.; Loret, Niccoló; Nettel, Francisco (2017) Rainbows without unicorns: metric structures in theories with modified dispersion relations. European Physical Journal C: Particles and Fields, 77 (7). pp. 451-1. ISSN 1434-6044

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Abstract

Rainbow metrics are a widely used approach to the metric formalism for theories with modified dispersion relations. They have had a huge success in the quantum gravity phenomenology literature, since they allow one to introduce momentum-dependent space-time metrics into the description of systems with a modified dispersion relation. In this paper, we introduce the reader to some realizations of this general idea: the original rainbow metrics proposal, the momentum-space-inspired metric and a Finsler geometry approach. As the main result of this work we also present an alternative definition of a four-velocity dependent metric which allows one to handle the massless limit. This paper aims to highlight some of their properties and how to properly describe their relativistic realizations.

Item Type:	Article
Uncontrolled Keywords:	quantum-spacetime; gravity rainbow; relativity; finsler
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNING Fabrizio NESTI 692194 EK
Depositing User:	Lovorka Čaja
Date Deposited:	09 Aug 2017 11:59
URI:	http://fulir.irb.hr/id/eprint/3523
DOI:	10.1140/epjc/s10052-017-5017-0

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