# A nearly massless graviton in Einstein-Gauss-Bonnet inflation with linear coupling implies constant-roll for the scalar field

@article{Oikonomou2020ANM, title={A nearly massless graviton in Einstein-Gauss-Bonnet inflation with linear coupling implies constant-roll for the scalar field}, author={Vasilis K. Oikonomou and F P Fronimos}, journal={EPL}, year={2020}, volume={131}, pages={30001} }

The striking GW170817 event indicated that the graviton is nearly massless, since the gamma rays emitted from the two neutron stars merging arrived almost simultaneously with the gravitational waves. Thus, the graviton must also be massless during the inflationary and post-inflationary era, since there is no obvious reason to believe otherwise. In this letter we shall investigate the theoretical implications of the constraint that the graviton is massless to an Einstein-Gauss-Bonnet theory with… Expand

#### 11 Citations

Reviving non-Minimal Horndeski-like Theories after GW170817: Kinetic Coupling Corrected Einstein-Gauss-Bonnet Inflation.

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Mehdi Shokri,1, ∗ Mohammad Reza Setare,1, † Salvatore Capozziello,2, 3, 4, 5, ‡ and Jafar Sadeghi6, 7, § Department of Physics, Campus of Bijar, University of Kurdistan, Bijar, Iran Dipartimento di… Expand

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Inflationary era of our Universe can be characterized as semi-classical because it can be described in the context of four-dimensional Einstein’s gravity involving quantum corrections. These string… Expand

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The Hawking-Page (HP) phase transitions of the anti-de Sitter black holes in the extended phase space are studied in a novel four-dimensional Einstein-Gauss-Bonnet (4EGB) gravity, which is proposed… Expand

Unifying inflation with early and late dark energy epochs in axion
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