NEUTRINO OSCILLATIONS IN STRONG GRAVITATIONAL-FIELDS

Neutrino oscillations in the presence of strong gravitational fields a re studied. We look at very high energy neutrinos (similar to 1 TeV) e manating from active galactic nuclei (AGN). It is observed that spin f lavor resonant transitions of such neutrinos may occur in the vicinity of AGN due to gravitational effects and due to the presence of a larg e magnetic field (similar to 1 T). A point to note is that matter effe cts (normal MSW transitions) become negligible in comparison to gravit ational effects in our scenario.