28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

Matter vs Vacuum Oscillations in Atmospheric Neutrinos

31 Jul 2020, 11:30
virtual conference

virtual conference

Talk 02. Neutrino Physics Neutrino Physics


Jaydeep Datta


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 oscillation 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 oscillations in the atmospheric neutrino data. We find that magnetized iron detector, ICAL at INO, can make a 3 σ discrimination between vacuum oscillations and matter oscillations in ten years, for both normal and inverted hierarchies.

Primary authors

Jaydeep Datta Mohammad Nizam (HBNI,Tata Institute of Fundamental Research) Ali Ajmi Sankagiri Umasankar (IIT Bombay)

Presentation materials