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arXiv · hep-th/0412083

Graviton Emission into Non-Z_2 Symmetric Brane World Spacetimes

Ian R. Vernon·David Jennings
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Abstract

The equations for the evolution of a homogeneous brane world that emits gravitons at early times, and into a non-Z_2 symmetric bulk, are derived using an AdS-Vaidya spacetime approximation. The behaviour of the black hole mass parameters either side of the brane is analysed, and it is found that in general graviton emission leads to a decrease in the non-Z_2 symmetry. However, the behaviour of the dark radiation term in the Friedmann equation is more complex: it is shown that this term can increase or decrease due to the non-Z_2 symmetry, and can become negative in some cases, leading to H=0 and the brane universe collapsing. Constraints on the initial (nonzero) sizes of the mass parameters are therefore derived.

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Ian R. Vernon, David Jennings. 2005-05-25. Graviton Emission into Non-Z_2 Symmetric Brane World Spacetimes. https://doi.org/10.1088/1475-7516%2F2005%2F07%2F011

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