Search Publications
Freeze-in production of sterile neutrino dark matter in a gauged U(1)‧ model with inverse seesaw
Poddar, Tanmay Kumar; Das, Arindam; Goswami, Srubabati +1 more
We consider a general, anomaly free U(1)‧ extension of the Standard Model (SM) where the neutrino mass is generated at the tree level via the inverse seesaw mechanism. The model contains three right handed neutrinos, three additional singlet fermions, one extra complex scalar and a neutral gauge boson (Z‧). Instead of resorting to a specific U(1) …
A model of light pseudoscalar dark matter
Chakdar, Shreyashi; Ghosh, Dilip Kumar; Hung, P. Q. +2 more
The EW-
Probing ultralight primordial black hole dark matter with XMM telescopes
Yuan, Qiang; Guo, Jun; Zhu, Bin
Primordial black holes (PBHs), originating from the gravitational collapse of large overdensities in the early Universe, emerge as a compelling dark matter (DM) candidate across a broad mass range. Of particular interest are ultra-light PBHs with masses around 1014 to 1017 g, which are typically probed by searching their evap…
Primordial black holes and gravitational waves in hybrid inflation with chaotic potentials
Ahmed, Waqas; Junaid, M.; Zubair, Umer
We study the formation of primordial black hole (PBH) dark matter and the generation of scalar induced secondary gravitational waves (SIGWs) in a non-supersymmetric model of hybrid inflation with chaotic (polynomial-like) potential, including one-loop radiative corrections. A radiatively corrected version of these models is entirely consistent wit…
Probability densities of the effective neutrino masses mβ and mββ
Meloni, Davide; Di Iura, Andrea
We compute the probability densities of the effective neutrino masses mβ and mββ using the Kernel Density Estimate (KDE) approach applied to a distribution of points in the (mmin ,mββ) and (mβ ,mββ) planes, obtained using the available Probability Distribution Functions (PDFs) of th…
Constraining the ionized gas evolution with CMB-spectroscopic survey cross-correlation
Ma, Yin-Zhe
We forecast the prospective constraints on the ionized gas model fgas (z) at different evolutionary epochs via the tomographic cross-correlation between kinetic Sunyaev-Zeldovich (kSZ) effect and the reconstructed momentum field at different redshifts. The experiments we consider are the Planck and CMB Stage-4 survey for CMB and the SDS…
Higgs inflation from new Kähler potential
Choudhury, Sayantan; Pal, Supratik; Chakraborty, Trina
We introduce a new class of models of Higgs inflation using the superconformal approach to supergravity by modifying the Kähler geometry. Using the above-mentioned mechanism, we construct a phenomenological functional form of a new Kähler potential followed by construction of various types of models which are characterized by a superconformal symm…