Effective Lagrangians and Universality Classes of Nonlinear Bigravity

Details Effective Lagrangians and Universality Classes of Nonlinear Bigravity Effective Lagrangians and Universality Classes of Nonlinear Bigravity

2002-06-05

arxiv.org/abs/hep-th/0206042v2

Phys.Rev. D66 (2002) 104024

Physics

High Energy Physics

High Energy Physics - Theory

41 pages, 4 Figures, final version to be published in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.66.104024

We discuss the fully non-linear formulation of multigravity. The concept of universality classes of effective Lagrangians describing bigravity, which is the simplest form of multigravity, is introduced. We show that non-linear multigravity theories can naturally arise in several different physical contexts: brane configurations, certain Kaluza-Klein reductions and some non-commutative geometry models. The formal and phenomenological aspects of multigravity (including the problems linked to the linearized theory of massive gravitons) are briefly discussed.

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