# Stronger gravity in the early universe

@inproceedings{MYoshimura2022StrongerGI, title={Stronger gravity in the early universe}, author={M.Yoshimura}, year={2022} }

Scalar-tensor theories of gravity that embrace conformal coupling to the scalar curvature are the focal point of cosmology on discussions of inﬂation and late-time accelerating universe. Although there exists a stringent nucleo-synthesis constraint on conformal gravity, one can formulate how to evade this diﬃculty by modifying the standard particle theory action consistently with the principles of gauge invariant quantum ﬁeld theory. It is shown that stronger gravity at early epochs of…

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We propose a new mechanism of lepton (L) number asymmetry generation, hence offer an explanation of matter-antimatter imbalance when a significant amount of baryon number is later transformed from…

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We study the propagation of cosmological gravitational wave (GW) backgrounds from the early radiation era until the present day in modified theories of gravity. Comparing to general relativity (GR),…

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