23 citations · 275 across the 31 of their papers we have counts for
14 papers · 1 filter
Dark Matter Freeze-in from a Reheaton
Avirup Ghosh, Alexei H. Sopov, Raymond R. Volkas
We consider the Standard Model (SM) extended by a secluded gauge sector encompassing a Dirac fermion () dark matter (DM), an abelian gauge boson and a SM-sin…
Cannibal dark matter decoupled from standard model: cosmological constraints
Avirup Ghosh, Sourav Gope, Satyanarayan Mukhopadhyay
An internally thermalized dark matter (DM) with only gravitational interaction with the standard model (SM) particles at low temperatures, may undergo number-changing self-scatteri…
Momentum distribution of dark matter produced in inflaton decay: effect of inflaton mediated scatterings
Avirup Ghosh, Satyanarayan Mukhopadhyay
Post-inflationary reheating is a widely discussed mechanism for non-thermal production of dark matter (DM). In this scenario the momentum distribution of the produced DM particles…
A general study of decaying scalar dark matter: existing limits and projected radio signals at the SKA
Koushik Dutta, Avirup Ghosh, Arpan Kar +1
We consider a decaying scalar dark matter (DM) with mass in the range 10 GeV - 10 TeV and vary the branching ratios of all possible two-body SM final states (excluding and in…
Decaying fermionic warm dark matter and XENON1T electronic recoil excess
Koushik Dutta, Avirup Ghosh, Arpan Kar +1
In the light of the recently observed XENON1T electronic recoil (ER) data, we investigate the possibility of constraining the parameter space of a generic fermionic warm dark matte…
Cosmology of complex scalar dark matter: interplay of self-scattering and annihilation
Avirup Ghosh, Deep Ghosh, Satyanarayan Mukhopadhyay
The cosmology of a standard model (SM) gauge singlet complex scalar dark matter (DM), stabilized by a reflection symmetry, is studied including all renormalizable interactions that…
Revisiting the role of CP-conserving processes in cosmological particle-antiparticle asymmetries
Avirup Ghosh, Deep Ghosh, Satyanarayan Mukhopadhyay
We point out qualitatively different possibilities on the role of CP-conserving processes in generating cosmological particle-antiparticle asymmetries, with illustrative examples f…
Models of decaying FIMP Dark Matter: potential links with the Neutrino Sector
Laura Covi, Avirup Ghosh, Tanmoy Mondal +1
The absolute stability of a dark matter (DM) particle is not a binding requirement. Here we suggest a few scenarios where the DM particle is liable to decay via extremely feeble in…
Asymmetric dark matter from semi-annihilation
Avirup Ghosh, Deep Ghosh, Satyanarayan Mukhopadhyay
We show that a general semi-annihilation scenario, in which a pair of dark matter (DM) particles annihilate to an anti-DM, and an unstable state that can mix with or decay to stand…
Search for decaying heavy dark matter in an effective interaction framework: a comparison of -ray and radio observations
Avirup Ghosh, Arpan Kar, Biswarup Mukhopadhyaya
We investigate and compare the possibilities of observing decaying dark matter (DM) in -ray and radio telescopes. The special emphasise of the study is on a scalar heavy DM part…
Gamma-ray signals from multicomponent scalar dark matter decays
Avirup Ghosh, Alejandro Ibarra, Tanmoy Mondal +1
Within a multicomponent dark matter scenario, novel gamma-ray signals may arise from the decay of the heavier dark matter component into the lighter. For a scalar dark sector of th…
Right sneutrino with masses as non-thermal dark matter
Avirup Ghosh, Tanmoy Mondal, Biswarup Mukhopadhyaya
We consider MSSM with right-chiral neutrino superfields with Majorana masses, where the lightest right-handed sneutrino dominated scalars constitutes non-thermal dark matter (DM).…
Long-lived stau, sneutrino dark matter and right-slepton spectrum
Shankha Banerjee, Geneviève Bélanger, Avirup Ghosh +1
The minimal supersymmetric (SUSY) standard model (MSSM) augmented by right chiral sneutrinos may lead to one such sneutrino serving as the lightest supersymmetric particle and a no…
Heavy stable charged tracks as signatures of non-thermal dark matter at the LHC : a study in some non-supersymmetric scenarios
Avirup Ghosh, Tanmoy Mondal, Biswarup Mukhopadhyaya
We consider two theoretical scenarios, each including a -odd sector and leading to an elementary dark matter candidate. The first one is a variant of the Type-III s…