Speaker
Neel Shah
(University of Portsmouth)
Description
The EFT of Dark Energy (EFTofDE) is a theoretically well-motivated class of modified gravity models, able to explain observational hints for dynamical dark energy with further testable predictions for structure growth and lensing. I will discuss the merits and challenges of combining probes of linear perturbations and present state-of-the-art constraints on the EFTofDE by combining CMB, BAO, SNe, RSD, ISW, and 3x2pt datasets. I will show that these constraints are driven not just by the constraining power of probes but also by theoretical priors. I will finally discuss how considering observables on mildly nonlinear scales from higher order terms in the EFTofDE Lagrangian can help to strengthen constraints further.
Author
Neel Shah
(University of Portsmouth)
Co-authors
Dr
Johannes Noller
(UCL)
Kazuya Koyama