20 citations · 38 across the 16 of their papers we have counts for
17 papers · 1 filter
Hadrophilic inelastic freeze-in dark matter in gauge extension and the high energy LZ event
Xiao-Gang He, Xuan Hong, Sk Jeesun
The recent observation of a single event at nuclear recoil energy keV by the LZ collaboration has prompted dark matter (DM) model builders to explore new physics ex…
Atmospheric neutrino up-scattering explanation of LZ 2026 excess
Sk Jeesun, Anirban Majumdar
The recent observation of an isolated nuclear recoil at keV energy by the LUX-ZEPLIN (LZ) experiment has motivated the community to look for a new physics explana…
MeV Electrophilic Axion-like Particles from Sun
Shao-Feng Ge, Sk Jeesun, Tao Li
This work explores the production of an MeV-scale electrophilic axion-like particles (ALPs) by utilizing the monochromatic 5.5MeV photon resulting from the nuclear fusion processes…
Shedding Stray Light on Decaying Light Dark Matter: Constraints from NuSTAR X-ray Observations
Sk Jeesun, Tanmoy Kumar
Light dark matter (DM) (mass keV) remains challenging to detect in several ongoing indirect detection experiments due to threshold limitations. Recent o…
Freeze-in vector dark matter at low reheating temperature
Dilip Kumar Ghosh, Sourav Gope, Xiao-Gang He +2
The freeze-in mechanism for dark matter (DM) requires extremely feeble interactions with the Standard Model (SM), preventing thermal equilibrium in the early Universe and typically…
CMB signatures of gravity-mediated dark radiation in
Anish Ghoshal, Sk Jeesun, Kazunori Kohri
Measurement of in the CMB (Cosmic Microwave Background) observations, like Planck 2018 and BBN (Big Bang Nucleosynthesis) has already set stringent constraints on the…
Primordial black holes as cosmic accelerators of light dark matter: Novel direct detection constraints
Sk Jeesun, Anirban Majumdar, Rahul Srivastava
Current multi-tonne-scale dark matter (DM) detectors are largely incapable of detecting light dark matter from the Galactic halo due to the energy threshold limitations of their re…
Cosmic-ray-electron boosted light dark matter: Implications of LZ 2025 data
Sk Jeesun, Anirban Majumdar
Current multiton detectors put stringent constraints on the GeV-scale galactic dark matter, pushing the allowed cross section almost toward the neutrino fog, yet remain mostly inse…
ALP and boson at the Electron-Ion collider
Amit Adhikary, Dilip Kumar Ghosh, Sk Jeesun +1
We study the sensitivity of the upcoming electron-ion (EIC) collider to purely electrophilic new physics in the GeV mass range. Within an effective field theory framework, we consi…
Probing Light Particles With Optically Trapped Sensors Through Nucleon Scattering
Bhaskar Dutta, Dilip Kumar Ghosh, Sk Jeesun
Optically levitated nanospheres are highly sensitive to the motion of their center of mass even under small momentum transfer. We propose detecting exotic particles via nucleon sca…
Blazar Boosted ALP and vector portal Dark matter confronting light mediator searches
Sk Jeesun
The trouble in detecting low mass dark matter due to its low kinetic energy can be ameliorated in the boosted dark matter framework, where a sub-population of galactic dark matter…
Boosted Dark Matter Driven by Cosmic Rays and Diffuse Supernova Neutrinos
Dilip Kumar Ghosh, Tushar Gupta, Matti Heikinheimo +2
Direct detection of light dark matter can be significantly enhanced by up-scattering of dark matter with energetic particles in the cosmic ambient. This boosted dark matter flux ca…
The at CMB challenges light gauge boson scenarios
Dilip Kumar Ghosh, Purusottam Ghosh, Sk Jeesun +1
The relativistic degrees of freedom () is one of the crucial cosmological parameters. The precise measurement of at the time of cosmic microwave backgrou…
Hubble Tension and Cosmological Imprints of Gauge Symmetry: as a case study
Dilip Kumar Ghosh, Purusottam Ghosh, Sk Jeesun +1
The current upper limit on at the time of CMB by Planck 2018 can place stringent constraints in the parameter space of BSM paradigms where their additional interactio…
Axion-like particle (ALP) portal freeze-in dark matter confronting ALP search experiments
Dilip Kumar Ghosh, Anish Ghoshal, Sk Jeesun
The relic density of Dark Matter (DM) in the freeze-in scenario is highly dependent on the evolution history of the universe and changes significantly in a non-standard (NS) cosmol…
CMB signature of non-thermal Dark Matter produced from self-interacting dark sector
Dilip Kumar Ghosh, Purusottam Ghosh, Sk Jeesun
The basic idea of this work is to achieve the observed relic density of a non-thermal dark matter(DM) and its connection with Cosmic Microwave Background (CMB) via additional relat…
Long lived inert Higgs in fast expanding universe and its imprint on cosmic microwave background
Dilip Kumar Ghosh, Sk Jeesun, Dibyendu Nanda
Presence of any extra radiation energy density at the time of cosmic microwave background formation can significantly impact the measurement of the effective relativistic neutrino…