  To expand our understanding of neutrino physics, scientific researchers of
astroparticle Physics directs their goal of detecting atmospheric tau neutrinos
in the GeV range. The effort will fundamentally unlock the nature of these
elusive particles while also investigating muon neutrinos and tau neutrino
oscillations. The Jiangmen Underground Neutrino Observatory (JUNO), which has
already started its operations in 2024, and the India-based Neutrino
Observatory (INO), which is not active right now but has future objectives in
conducting research, have both emerged as key players in this field. These
experiments used theoretical and experimental methodologies to understand the
properties and behaviour of atmospheric tau neutrinos. The JUNO experiment,
which has an estimated ability to detect around 50 events per year, and the
INO, which used an impressive 50,000-ton iron slab as a detector, will
contribute significantly in this domain. The detection of all tau neutrinos
charged-current (CC) interactions with the detection material, which is divided
into former and later events based on the timeline corresponding to scattering
and capture in the detector; moreover, the KamLAND experiment is also capable
of detecting these tau neutrinos decays, however, in smaller proportions, which
could be possibly confused with background signals emerging from oscillations.
This has been studied for both experiments for tau neutrinos nuclei
cross-sections, and its standard value is taken as a base for calculations.
Both INO and JUNO have 5 sigma sensitivity, which was exposed for 5 to 10
years.
