30 citations · 148 across the 16 of their papers we have counts for
16 papers
Leptogenesis in Brane-modified cosmology: Signatures in primordial gravitational waves
Amit Dutta Banik, Arnab Paul
We investigate the implications of brane-inspired modifications of the evolutionary history of the early universe on the process of baryogenesis via leptogenesis. A modified cosmic…
Primary gravitational waves at high frequencies II: Emergence of the exponential cut-off in the power spectrum
Alipriyo Hoory, Jerome Martin, Arnab Paul +1
[Abridged] In slow roll inflation, the power spectrum (PS) of primary gravitational waves (PGWs) generated from the quantum vacuum rises as over wave numbers which never…
Kination-like Era Driven by the Effective Inflaton/Higgs Potential
Anish Ghoshal, Nobuchika Okada, Arnab Paul
Based on the minimal extended Standard Model, we explore cosmic inflation where the Higgs field serves as the inflaton. We demonstrate that a stiff era with an eq…
Double Inflation in Classically Conformal Model
Anish Ghoshal, Nobuchika Okada, Arnab Paul +1
It has recently been shown in Ref. [1] that the double-inflation scenario based on the Coleman-Weinberg potential can successfully generate primordial black holes (PBHs) with the i…
Cosmic inflation and in minimal gauged model
Arnab Paul, Sourov Roy, Abhijit Kumar Saha
The minimal gauge symmetry extended Standard Model (SM) is a well motivated framework that resolves the discrepancy between the theoretical prediction and experime…
Imprints of dark matter-massive neutrino interaction in upcoming post-reionization and galaxy surveys
Antara Dey, Arnab Paul, Supratik Pal
We explore possible signatures of the interaction between dark matter (DM) and massive neutrinos during the post-reionization epoch. Using both Fisher matrix forecast analysis and…
Near-inflection point inflation and production of dark matter during reheating
Anish Ghoshal, Gaetano Lambiase, Supratik Pal +2
We study slow roll single field inflationary scenario and the production of non-thermal fermionic dark matter, together with standard model Higgs, during reheating. For the inflati…
Signatures of Non-thermal Dark Matter with Kination and Early Matter Domination: Gravitational Waves versus Laboratory Searches
Anish Ghoshal, Lucien Heurtier, Arnab Paul
The non-thermal production of dark matter (DM) usually requires very tiny couplings of the dark sector with the visible sector and therefore is notoriously challenging to hunt in l…
Constraints on Dark Matter-Neutrino Interaction from 21-cm Cosmology and Forecasts on SKA1-Low
Antara Dey, Arnab Paul, Supratik Pal
In this article, we have done a thorough investigation of the possible effects of interaction between dark matter (DM) and neutrinos on reionization history. We have constrained th…
Inflection-point Inflation and Dark Matter Redux
Anish Ghoshal, Gaetano Lambiase, Supratik Pal +2
We investigate for viable models of inflation that can successfully produce dark matter (DM) from inflaton decay process, satisfying all the constraints from Cosmic Microwave Backg…
eV Hubble Scale Inflation with Radiative Plateau: Very light Inflaton, Reheating & Dark Matter in B-L Extensions
Anish Ghoshal, Nobuchika Okada, Arnab Paul
We study radiative plateau-like inflation \& Z-portal freeze-in fermionic dark matter (DM) in a minimal B-L extended model. The U(1) Higgs, responsible for heavy neu…
Radiative Plateau Inflation with Conformal Invariance: Dynamical Generation of Electroweak and Seesaw Scales
Anish Ghoshal, Nobuchika Okada, Arnab Paul
We investigate a scale-invariant scenario where the Standard Model (SM) is supplemented with a dark scalar which has gauge \& Yukawa interactions, with the couplings $g_{…
Shedding Light on Dark Matter and Neutrino Interactions from Cosmology
Arnab Paul, Arindam Chatterjee, Anish Ghoshal +1
In CDM cosmology, Dark Matter (DM) and neutrinos are assumed to be non-interacting. However, it is possible to have scenarios, where DM-neutrino interaction may be present, l…
Estimating weak lensing convergence correlation of Type-Ia supernovae from 5-year SNLS data by internal error estimate technique
Ayan Mitra, Arnab Paul, Barun Pal +1
We report non-zero weak lensing convergence correlation signal of Type-Ia supernovae from 5-year Supernovae Legacy Survey data. For our analysis we utilize 296 supernovae magnifica…
Non-thermal production of Dark Matter after Inflation
Nicolás Bernal, Arindam Chatterjee, Arnab Paul
The existence of Dark Matter (DM) has been well established from various cosmological and astrophysical evidences. However, the particle properties of DM are largely undetermined a…
Inflation, (P)reheating and Neutrino Anomalies: Production of Sterile Neutrinos with Secret Interactions
Arnab Paul, Anish Ghoshal, Arindam Chatterjee +1
A number of experimental anomalies involving neutrinos hint towards the existence of at least an extra (a very light) sterile neutrino. However, such a species, appreciably mixing…