https://doi.org/10.1140/epjc/s10052-019-6634-6
Regular Article - Theoretical Physics
Testing dark energy models in the light of 
tension
1
Dipartimento di Fisica “E.R. Caianiello”, Universitá di Salerno, 84084, Fisciano, SA, Italy
2
INFN - Gruppo Collegato di Salerno, Fisciano, Italy
3
Theoretical Physics Division, Physical Research Laboratory, Ahmedabad, 380009, India
4
Indian Institute of Technology, Gandhinagar, India
* e-mail: lambiase@sa.infn.it
Received:
6
May
2018
Accepted:
30
January
2019
Published online:
15
February
2019
It has been pointed out that there exists a tension in 
measurement between CMB and LSS observation. In this paper we show that observations can be used to test the dark energy theories. We study two models, (1) Hu–Sawicki (HS) Model of f(R) gravity and (2) Chavallier–Polarski–Linder (CPL) parametrization of dynamical dark energy (DDE), both of which satisfy the constraints from supernovae. We compute consistent with the parameters of these models. We find that the well known tension in between Planck CMB and large scale structure (LSS) observations is (1) exacerbated in the HS model and (2) somewhat alleviated in the DDE model. We illustrate the importance of the measurements for testing modified gravity models. Modified gravity models change the matter power spectrum at cluster scale which also depends upon the neutrino mass. We present the bound on neutrino mass in the HS and DDE model.
© The Author(s), 2019
