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- W2805293570 abstract "A bstract We investigate the properties of fakeons in quantum gravity at one loop. The theory is described by a graviton multiplet, which contains the fluctuation h μν of the metric, a massive scalar ϕ and the spin-2 fakeon χ μν . The fields ϕ and χ μν are introduced explicitly at the level of the Lagrangian by means of standard procedures. We consider two options, where ϕ is quantized as a physical particle or a fakeon, and compute the absorptive part of the self-energy of the graviton multiplet. The width of χ μν , which is negative, shows that the theory predicts the violation of causality at energies larger than the fakeon mass. We address this issue and compare the results with those of the Stelle theory, where χ μν is a ghost instead of a fakeon." @default.
- W2805293570 created "2018-06-13" @default.
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- W2805293570 date "2018-11-01" @default.
- W2805293570 modified "2023-10-16" @default.
- W2805293570 title "Quantum gravity, fakeons and microcausality" @default.
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- W2805293570 doi "https://doi.org/10.1007/jhep11(2018)021" @default.
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