# 7th International Conference on New Frontiers in Physics (ICNFP2018)

Jul 4 – 12, 2018
Europe/Athens timezone
Group photo: indico.cern.ch/event/663474/images/19808-ICNFP_2018_Group_Photo.JPG

## δ Gravity, δ matter and the accelerated expansion of the Universe

Jul 5, 2018, 12:00 PM
30m
Room 3

### Room 3

Oral presentation

### Speaker

Prof. Jorge Alfaro (Pontificia Universidad Católica de Chile)

### Description

A gravitational field model based on two symmetric tensors, $g_{μν}$ and $\tilde{g}_{μν}$, is presented. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry (δ symmetry). We call them δ matter fields. We find that massive particles do not follow geodesics, while trajectories of massless particles are null geodesics of an effective metric. Then we study the Cosmological case, where we get an accelerated expansion of the Universe without dark energy.

### Primary authors

Prof. Jorge Alfaro (Pontificia Universidad Católica de Chile) Dr Pablo González (Pontificia Universidad Católica de Chile)