186 citations · 1.7k across the 54 of their papers we have counts for
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Primordial power spectrum from Planck
Dhiraj Kumar Hazra, Arman Shafieloo, Tarun Souradeep
Using modified Richardson-Lucy algorithm we reconstruct the primordial power spectrum (PPS) from Planck Cosmic Microwave Background (CMB) temperature anisotropy data. In our analys…
Wiggly Whipped Inflation
Dhiraj Kumar Hazra, Arman Shafieloo, George F. Smoot +1
Motivated by BICEP2 results on the CMB polarization B-mode which imply primordial gravitational waves are produced when the Universe has the expansion rate of about $H \approx 10^{…
Sharp inflaton potentials and bi-spectra: Effects of smoothening the discontinuity
Jerome Martin, L. Sriramkumar, Dhiraj Kumar Hazra
Sharp shapes in the inflaton potentials often lead to short departures from slow roll which, in turn, result in deviations from scale invariance in the scalar power spectrum. Typic…
Whipped inflation
Dhiraj Kumar Hazra, Arman Shafieloo, George F. Smoot +1
Motivated by the idea that inflation occurs at the GUT symmetry breaking scale, in this paper we construct a new class of large field inflaton potentials where the inflaton starts…
Ruling out the power-law form of the scalar primordial spectrum
Dhiraj Kumar Hazra, Arman Shafieloo, George F. Smoot +1
Combining Planck CMB temperature [1] and BICEP2 B-mode polarization data [2,3] we show qualitatively that, assuming inflationary consistency relation, the power-law form of the sca…