GW170817 Viable Einstein-Gauss-Bonnet inflation compatible with the atacama cosmology telescope data
Odintsov S.D. Oikonomou V.K.
September 2025Elsevier B.V.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
2025#868
In this work we investigate several Einstein-Gauss-Bonnet models that are compatible with the GW170817 event, the Atacama Cosmology Telescope data and the BICEP/Keck updated Planck constraints on the tensor-to-scalar ratio. We consider two distinct classes of Einstein-Gauss-Bonnet theories, which are equally successful for GW170817-compatible model building and we examine their viability against the Atacama Cosmology Telescope data and the updated Planck constraints on the tensor-to-scalar ratio. The two models are distinct since the first class relates directly the non-minimal Gauss-Bonnet scalar coupling function with the scalar potential and yields cT2=1 while in the second class, the non-minimal Gauss-Bonnet scalar coupling function and the scalar potential are freely but conveniently chosen and the class of models respects the constraint |cT2−1|<6×10−15. We provide several examples of models belonging to both the two classes of GW170817-compatible Einstein-Gauss-Bonnet theories and we demonstrate that Einstein-Gauss-Bonnet theories provide a promising theoretical framework for inflationary dynamics.
04.50.Kd , 11.25.-w , 95.36.+x , 98.80.-k , 98.80.Cq , ACT , Atacama cosmology telescope , Einstein-Gauss-Bonnet theories , Inflation , String corrected inflation
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Institute of Space Sciences (ICE, CSIC) C. Can Magrans s/n, Barcelona, 08193, Spain
ICREA, Passeig Luis Companys, 23, Barcelona, 08010, Spain
L.N. Gumilyov, Eurasian National University, Astana, 010008, Kazakhstan
Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
International Center of Gravity and Cosmos, Systems and Radioelectronics (TUSUR), Laboratory for Theoretical Cosmology, Tomsk State University of Control, Tomsk, 634050, Russian Federation
Institute of Space Sciences (ICE
ICREA
L.N. Gumilyov
Department of Physics
International Center of Gravity and Cosmos
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