299 citations · 634 across the 18 of their papers we have counts for
19 papers
Phantom-divide crossing and suppressed structure growth in kinetically braided dark energy with momentum exchange
Masroor C. Pookkillath, Shinji Tsujikawa
We construct a linearly stable scalar-field model that realizes both an upward crossing of the dark-energy equation of state, from to , and weakened…
A no-go theorem in bumblebee vector-tensor cosmology
Carsten van de Bruck, Mohammad Ali Gorji, Nils A. Nilsson +2
Bumblebee models, a class of vector-tensor theories in which a vector field acquires a nonzero vacuum expectation value that spontaneously breaks spacetime symmetries, are ubiquito…
Effective field theory of coupled dark energy and dark matter
Katsuki Aoki, Jose Beltrán Jiménez, Masroor C. Pookkillath +1
We formulate an effective field theory (EFT) of coupled dark energy (DE) and dark matter (DM) interacting through energy and momentum transfers. In the DE sector, we exploit the EF…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
-- interacting scalar tensor dark energy
Masroor C. Pookkillath, Nandan Roy
We study the effect of adding an interaction in the term of Horndeski theory, where the propagation of gravitational waves are not modified. We derive the background and pert…
CMB spectrum in unified EFT of dark energy: scalar-tensor and vector-tensor theories
Katsuki Aoki, Mohammad Ali Gorji, Takashi Hiramatsu +3
We study the cosmic microwave background (CMB) radiation in the unified description of the effective field theory (EFT) of dark energy that accommodates both scalar-tensor and vect…