359 citations · 476 across the 17 of their papers we have counts for
8 papers · 1 filter
Primordial Black Hole from Tensor-induced Density Fluctuation: First-order Phase Transitions and Domain Walls
Utkarsh Kumar, Anish Ghoshal
Gravitational waves generated by violent processes in the early Universe necessarily couple to scalar perturbations beyond linear order. We show that tensor perturbations produced…
Impact of Low ell's on Large Scale Structure Anomalies
Ido Ben-Dayan, Utkarsh Kumar, Meir Shimon +1
We scrutinize the reported lensing anomaly of the CMB by considering several phenomenological modifications of the lensing consistency parameter, . Considering Planck sp…
Theoretical Priors and the Dark Energy Equation of State
Ido Ben-Dayan, Utkarsh Kumar
We revisit the theoretical priors used for inferring Dark Energy (DE) parameters. Any DE model must have some form of a tracker mechanism such that it behaved as matter or radiatio…
Probing The Early Universe Cosmology With NANOGrav: Possibilities and Limitations
Ido Ben-Dayan, Utkarsh Kumar, Udaykrishna Thattarampilly +1
A stochastic gravitational wave background is a prediction of a number of astrophysical and cosmological phenomena including early Universe Cosmology. Recently, the NANOGrav Collab…
Emergent Unparticles Dark Energy can restore cosmological concordance
Ido Ben-Dayan, Utkarsh Kumar
Addressing the discrepancy between the late and early time measurements of the Hubble parameter, , and the so-called parameter has been a challenge in precision cosmolog…
Small Field models with ACTPol and BICEP3 data -- Likelihood analysis
Ira Wolfson, Utkarsh Kumar, Ido Ben-Dayan +1
We perform a Bayesian analysis for small field models of inflation, using the most recent datasets produced by Planck`18, ACTPol, and BICEP3. We employ Artificial Neural Networks (…