76 citations · 1.3k across the 130 of their papers we have counts for
27 papers · 1 filter
Distinct signatures of spinning PBH domination and evaporation: doubly peaked gravitational waves, dark relics and CMB complementarity
Nilanjandev Bhaumik, Anish Ghoshal, Rajeev Kumar Jain +1
Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), can l…
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…
Minimal Leptogenesis in Brane-inspired Cosmology
Alessandro Di Marco, Amit Dutta Banik, Anish Ghoshal +1
We discuss how a post inflationary reheating phase characterized by a nonstandard multiple scalar field cosmology can change the thermal history of the universe, affecting minimal…
Bremsstrahlung High-frequency Gravitational Wave Signatures of High-scale Non-thermal Leptogenesis
Anish Ghoshal, Rome Samanta, Graham White
Inflaton seeds non-thermal leptogenesis by pair producing right-handed neutrinos in the seesaw model. We show that the inevitable graviton bremsstrahlung associated with inflaton d…
Effective potential in non-perturbative gauge theories
Gianluca Calcagni, Marco Frasca, Anish Ghoshal
We consider a formalism to describe the false-vacuum decay of a scalar field in gauge theories in non-perturbative regimes. We find that the larger the gauge coupling with respect…
Quark confinement in QCD in the 't Hooft limit
Marco Frasca, Anish Ghoshal, Stefan Groote
We treat quantum chromodynamics (QCD) using a set of Dyson-Schwinger equations derived, in differential form, with the Bender-Milton-Savage technique. In this way, we are able to d…
CMB imprints of high scale non-thermal leptogenesis
Anish Ghoshal, Dibyendu Nanda, Abhijit Kumar Saha
We study the imprints of high scale non-thermal leptogenesis on cosmic microwave background (CMB) from the measurements of inflationary spectral index () and tensor-to-scalar…
Probing Freeze-in Dark Matter via Heavy Neutrino Portal
Basabendu Barman, P. S. Bhupal Dev, Anish Ghoshal
We explore the possibility of probing freeze-in dark matter (DM) produced via the right-handed neutrino (RHN) portal using the RHN search experiments. We focus on a simplified fram…
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…
Confining complex ghost degrees of freedom
Marco Frasca, Anish Ghoshal, Alexey S. Koshelev
We show a theorem proving that a non-local bosonic field upon a covariant interaction with a confining gauge field undergoes the confinement of its degrees of freedom present in th…
Probing High Scale Dirac Leptogenesis via Gravitational Waves from Domain Walls
Basabendu Barman, Debasish Borah, Arnab Dasgupta +1
We propose a novel way of probing high scale Dirac leptogenesis, a viable alternative to canonical leptogenesis scenario where the total lepton number is conserved, keeping light s…
Doubly peaked induced stochastic gravitational wave background : Testing baryogenesis from primordial black holes
Nilanjandev Bhaumik, Anish Ghoshal, Marek Lewicki
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the univers…
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…
Fate of false vacuum in non-perturbative regimes: Gravity effects
Gianluca Calcagni, Marco Frasca, Anish Ghoshal
A recent analysis of the false-vacuum decay in non-perturbative regimes is here extended in the presence of Einstein gravity, computing the corresponding effective potential and de…
Gravitational Wave Pathway to Testable Leptogenesis
Arnab Dasgupta, P. S. Bhupal Dev, Anish Ghoshal +1
We analyze the classically scale-invariant model in the context of resonant leptogenesis with the recently proposed mass-gain mechanism. The symmetry breaking in this s…
Inflation and primordial gravitational waves in scale-invariant quadratic gravity with Higgs
Anish Ghoshal, Debangshu Mukherjee, Massimiliano Rinaldi
In scale-invariant models of fundamental physics all mass scales are generated via spontaneous symmetry breaking. In this work, we study inflation in scale-invariant quadratic grav…
Type III seesaw with R-parity violation in light of (CDF)
Anish Ghoshal, Nobuchika Okada, Satomi Okada +3
Motivated by the recently reported measurement of the boson mass GeV by the CDF collaboration, we propose a type III seesaw extension of the minimal…
The Forward Physics Facility at the High-Luminosity LHC
Jonathan L. Feng, Felix Kling, Mary Hall Reno +233
High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing L…
Quintessence Dark Energy from strongly-coupled Higgs mass gap: Local and Non-local higher-derivative non-perturbative scenarios
Marco Frasca, Anish Ghoshal, Alexey Koshelev
We entertain the possibility that dark energy arises from the Higgs field of quintessence type in the non-perturbative regimes. For this purpose we utilize a set of exact solutions…
Detectable Gravitational Waves from preheating probes non-thermal Dark Matter
Anish Ghoshal, Pankaj Saha
We describe the challenges and pathways when probing inflaton as dark matter with the stochastic gravitational waves (GWs) signal generated during the (p)reheating. Such scenarios…
Probing pre-BBN era with Scale Invariant FIMP
Basabendu Barman, Anish Ghoshal
Detecting dark matter (DM) relic via freeze-in is difficult in laboratories due to smallness of the couplings involved. However, a non-standard cosmological history of the Universe…
Fate of the false vacuum in string-inspired nonlocal field theory
Anish Ghoshal, Florian Nortier
In this article, we study Coleman bounce in weakly nonlocal theories which are motivated from string field theory. The kinetic term is extended via an infinite series of high-order…
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_{…