Speaker
Francisco Plaza
(Facultad de Ciencias Astronomicas y Geofisicas UNLP)
Description
In this work, we propose an alternative model of cosmic inflation based on unimodular gravity (UG), an alternative theory of gravitation to General Relativity. The key feature of our model is that the primordial inhomogeneities are generated directly by the Higgs field. By combining the distinctive properties of unimodular gravity with the well-established characteristics of the Higgs field, this framework is able to address the standard problems of the early Universe. In this talk, we present the main features of the predicted primordial scalar power spectrum and compare its predictions with the constraints derived from observations of the cosmic microwave background in order to assess the viability of the model.
Author
Francisco Plaza
(Facultad de Ciencias Astronomicas y Geofisicas UNLP)