Eur. Phys. J. C (2017) 77: 805
https://doi.org/10.1140/epjc/s10052-017-5387-3

Regular Article - Theoretical Physics

Bianchi type I expanding universe in Weyl-invariant gravity with a quartic interaction term

Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan

^* e-mail: gore@mail.nctu.edu.tw

Received: 28 September 2017
Accepted: 14 November 2017
Published online: 26 November 2017

Abstract

We will focus on the effect of a Weyl-invariant model with a quadratic interaction term and a free scalar field . A set of analytic solutions will be obtained for this model. This model provides a dynamical alternative to the standard CDM model. In particular, we will show that the quartic Weyl-invariant model prediction is consistent with the Hubble diagram observations.