Atmospheric neutrinos travel very long distances
through earth matter. It is expected that the matter effects
lead to significant changes in the neutrino survival and oscil-
lation probabilities. Initial analysis of atmospheric neutrino
data by the Super-Kamiokande collaboration is done using
the vacuum oscillation hypothesis, which provided a good fit
to the data. Existence of matter effects is well established for
solar neutrino oscillations but not for atmospheric neutrino
oscillations. In this work, we did a study to differentiate the
effects of vacuum oscillations and matter modified oscilla-
tions in the atmospheric neutrino data. We find that magne-
tized iron detector, ICAL at INO, can make a 3 σ discrimi-
nation between vacuum oscillations and matter oscillations
in ten years, for both normal and inverted hierarchies.
ICAL can make a 3 σ discrimination between vacuum and matter oscillations in atmospheric neutrinos.
|Experiment/Collaboration||India-Based Neutrino Observatory (INO)|