Weak Field Expansion of Gravity and Graphical Representation

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We introduce a graphical representation for a global SO(n) tensor $\pl_\m\pl_\n h_\ab$, which generally appears in the perturbative approach of gravity around the flat space: $g_\mn=\del_\mn+h_\mn$. We systematically construct global SO(n) invariants. Independence and completeness of those invariants are shown by taking examples of $\pl\pl h$-, and $ (\pl\pl h)^2$- invariants. They are classified graphically. Indices which characterize all independent invariants (or graphs) are given. We apply the results to general invariants with dimension $(Mass)^4$ and the Gauss-Bonnet identity in 4-dim gravity.
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High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/54718

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/9609013
 http://arxiv.org/abs/hep-th/9609013

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arXiv