We study the propagation and oscillations of neutrinos in curved spacetime backgrounds. First, we are interested in spin oscillations of neutrinos scattered off a black hole. This research is inspired by the recent observation of the black hole shadow by the Even Horizon Telescope. We analyze how the flux of neutrinos is modified by the gravitational interaction with a rotating black hole surrounded by a magnetized accretion disk, accounting for the neutrino spin precession. Second, we study flavor oscillations of neutrinos in stochastic gravitational waves. This research is motivated by the recent observation of gravitational waves by the LIGO-Virgo Collaborations. We find the fluxes of supernova neutrinos measured by a terrestrial detector. These neutrinos are supposed to interact with stochastic gravitational waves with realistic spectra. The implication of the obtained results for the neutrino astronomy is discussed.
1. M. Dvornikov, Phys. Rev. D 104, 043018 (2021), arXiv:2103.15464.
2. M. Dvornikov, JCAP 04 (2021) 005, arXiv:2102.00806.