On the unitarity of linearized General Relativity coupled to matter

Details On the unitarity of linearized General Relativity coupled to matter On the unitarity of linearized General Relativity coupled to matter

2010-01-29

arxiv.org/abs/1002.0003v2

Phys.Lett.B695:298-302,2011

Physics

High Energy Physics

High Energy Physics - Theory

9 pages

Scientific paper

10.1016/j.physletb.2010.10.049

We consider the unitarity of the S-matrix for linearized General Relativity coupled to particle physics models. Taking renormalization group effects of the Planck mass into account, we find that the scale at which unitarity is violated is strongly dependent on the particle content of the theory. We find that the requirement that the S-matrix be unitary up to the scale at which quantum gravitational effects become strong implies a bound on the particle content of the model.

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