General Embedded Brane Effective Field Theories

Details General Embedded Brane Effective Field Theories General Embedded Brane Effective Field Theories

2011-03-30

arxiv.org/abs/1103.6029v2

Phys.Rev.Lett.106:231102,2011

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 1 figure, version appearing in PRL

Scientific paper

10.1103/PhysRevLett.106.231102

We present a new general class of four-dimensional effective field theories with interesting global symmetry groups. These theories arise from purely gravitational actions for (3+1)-dimensional branes embedded in higher dimensional spaces with induced gravity terms. The simplest example is the well known Galileon theory, with its associated Galilean symmetry, arising as the limit of a DGP brane world. However, we demonstrate that this is a special case of a much wider range of theories, with varying structures, but with the same attractive features such as second order equations. In some circumstances, these new effective field theories allow potentials for the scalar fields on curved space, with small masses protected by non-linear symmetries. Such models may prove relevant to the cosmology of both the early and late universe.

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