Neutrino oscillations in a Kalb-Ramond black hole background

TL;DR

This paper investigates how neutrino oscillations are affected by a black hole environment influenced by a Kalb-Ramond field, revealing Lorentz-violating effects on neutrino behavior and observable signals.

Contribution

It introduces a detailed analysis of neutrino oscillations in a Lorentz-violating black hole background with numerical simulations for multiple flavors and mass orderings.

Findings

Altered neutrino-antineutrino annihilation energy output

Shifts in oscillation phase due to gravitational lensing

Distortions in flavor conversion probabilities

Abstract

The analysis examines how neutrinos behave when their trajectories unfold around a black hole sourced by a Kalb-Ramond field, where spontaneous Lorentz symmetry breaking reshapes the surrounding geometry. Instead of following the conventional order, the study focuses first on the observable consequences: alterations in the neutrino-antineutrino annihilation energy output, shifts in the oscillation phase accumulated along the path, and distortions in flavor conversion probabilities induced by gravitational lensing. These features are then tied to the Lorentz-violating spacetime structure, which governs the propagation of the neutrinos. Numerical simulations are carried out for both two- and three-flavor descriptions, with normal and inverted mass orderings.