A5042901145- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
Indian Institute of Science Education and Research Mohali
2020-2023
In flat spacetime, the vacuum neutrino flavor oscillations are known to be sensitive only difference between squared masses, and not individual of neutrinos. this work, we show that lensing neutrinos induced by a gravitational source substantially modifies standard picture it gives rise novel contribution through which oscillation probabilities also depend on masses. A gravitating mass located detector deflects in their journey, at detection point, arriving different paths can lead...
We study neutrino oscillations in a rotating spacetime under the weak gravity limit for trajectories of neutrinos which are constrained equatorial plane. Using asymptotic form Kerr metric, we show that rotation gravitational source non-trivially modifies phase. find oscillation probabilities deviate significantly from corresponding results Schwarzschild when produced near black hole (still weak-gravity limit) with non-zero angular momentum and detected on same side, i.e., non-lensed...
We study decoherence effects in neutrino flavor oscillations curved spacetime with particular emphasis on the lensing a Schwarzschild geometry. Assuming Gaussian wave packets for neutrinos, we argue that length derived from exponential suppression of transition amplitude depends proper time geodesic connecting events production and detection general gravitational setting. In weak gravity limit, between two given distance is smaller than flat spacetime. Therefore, presence object, have to...