3 papers
astro-ph.CO2025
Viscous Dark Energy and Mass-Varying Dark Matter in Lyra Manifold: Cosmological Dynamics and Observational Constraints
Giridhari Deogharia, Madhurima Pandey, Ashadul Halder
We investigate the cosmological dynamics of a universe described by Lyra's geometry in the presence of dark energy (DE) and dark matter (DM). Dark energy is modeled as a quintessen…
physics.ed-ph2025
Bridging the Gap Between Virtual and Physical Laboratories: A Web-Based Interactive Platform for Undergraduate Physics Practicals
Ashadul Halder, Shibaji Banerjee
The COVID-19 pandemic highlighted the challenges of maintaining hands-on laboratory instruction in undergraduate physics education. In response, we developed and deployed an intera…
hep-ph2025
IceCube PeV neutrinos from heavy dark matter decay with 12 years HESE data
Diptarko Mukherjee, Ashadul Halder, Debasish Majumdar +1
The decay of superheavy dark matter from the early universe may undergo decay via QCD cascades and electroweak cascade to produce neutrinos as one of the decay products. We conside…