Work

Probing the interaction between dark matter and dark energy in the presence of massive neutrinos

Year: 2016

Type: article

Abstract: We consider the possibility of an interaction in the dark sector in the presence of massive neutrinos and study the observational constraints on three different scenarios of massive neutrinos using the most recent cosmic microwave background anisotropy data in combination with type Ia supernovae, baryon acoustic oscillations, and Hubble parameter measurements. When a sterile neutrino is introduced into the interacting dark sector scenario in addition to the standard model prediction of neutrinos, we find that the coupling parameter is nonzero at a $2\ensuremath{\sigma}$ confidence level. The interaction model with a sterile neutrino is also found to be a promising one to alleviate the current tension on the Hubble constant. We do not find the evidence for a coupling in the dark sector when the possibility of a sterile neutrino is discarded.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.94.123511

Authors: Suresh Kumar, Rafael C. Nunes

Institutions: Birla Institute of Technology and Science, Pilani, Universidade Federal de Juiz de Fora

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Science and Engineering Research Board

Award: G1899255544