S. Das

collaborators

3 papers

hep-ex2024

Search for a heavy neutral lepton that mixes predominantly with the tau neutrino

Belle Collaboration, M. Nayak, S. Dey +165

We report a search for a heavy neutral lepton (HNL) that mixes predominantly with $ν_{τ}$ . The search utilizes data collected with the Belle detector at the KEKB asymmetric energy $e…

hep-ex2023

Evidence for $B^{+} \to K^{+} ν ν ˉ$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +452

We search for the rare decay $B^{+} \to K^{+} ν ν ˉ$ in a $362 fb^{- 1}$ sample of electron-positron collisions at the $Υ (4 S)$ resonance collected with the Belle II det…

astro-ph.SR2023

A multi-wavelength analysis of BL Her stars: Models versus Observations

S. Das, L. Molnár, S. M. Kanbur +6

We present new theoretical period--luminosity (PL) and period--radius (PR) relations at multiple wavelengths (Johnson--Cousins--Glass and {\sl Gaia} passbands) for a fine grid of B…

Search for a heavy neutral lepton that mixes predominantly with the tau neutrino

Evidence for B+→K+ννˉ decays

A multi-wavelength analysis of BL Her stars: Models versus Observations

Evidence for $B^{+} \to K^{+} ν ν ˉ$ decays