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Open AccessArticle

Renormalizable and Unitary Model of Quantum Gravity

by S. A. Larin
Institute for Nuclear Research of the Russian Academy of Sciences, Theory Division, 60th October Anniversary Prospect, 7-A, 117312 Moscow, Russia
Extension of XX-th International Seminar on High Energy Physics (QUARKS-2018) Report.
Symmetry 2019, 11(11), 1334; https://doi.org/10.3390/sym11111334
Received: 15 August 2019 / Revised: 9 October 2019 / Accepted: 16 October 2019 / Published: 25 October 2019
(This article belongs to the Special Issue Modified Theories of Gravity)
We consider R + R 2 relativistic quantum gravity with the action where all possible terms quadratic in the curvature tensor are added to the Einstein-Hilbert term. This model was shown to be renormalizable in the work by K.S. Stelle. In this paper, we demonstrate that the R + R 2 model is also unitary contrary to the statements made in the literature, in particular in the work by Stelle. New expressions for the R + R 2 Lagrangian within dimensional regularization and the graviton propagator are derived. We demonstrate that the R + R 2 model is a good candidate for the fundamental quantum theory of gravity. View Full-Text
Keywords: modified theories of gravity; quantum gravity; renormalizability; unitarity modified theories of gravity; quantum gravity; renormalizability; unitarity
MDPI and ACS Style

Larin, S.A. Renormalizable and Unitary Model of Quantum Gravity. Symmetry 2019, 11, 1334.

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