Neutrino oscillations induced by a new bumblebee black hole

TL;DR

This paper explores how a new black hole model from bumblebee gravity affects neutrino oscillations, revealing enhanced annihilation, altered phase shifts, and modified flavor transitions due to Lorentz symmetry breaking.

Contribution

It introduces a novel black hole solution in bumblebee gravity and analyzes its impact on neutrino oscillations, including energy deposition, phase shifts, and lensing effects.

Findings

Lorentz-violating deformation increases annihilation efficiency

Characteristic shifts in neutrino oscillation phase

Reshaped angular dependence of flavor transitions

Abstract

This work investigates neutrino propagation in the spacetime of a newly introduced black hole arising from spontaneous Lorentz-symmetry breaking in bumblebee gravity. The analysis focuses on three independent components: the rate at which neutrino-antineutrino annihilation deposits energy in the surrounding region, the geometric contribution to the phase accumulated by neutrino mass eigenstates, and the modifications to flavor conversion produced by weak gravitational lensing. Working with a two-flavor system, both mass orderings are examined, and the calculation incorporates the interference between distinct trajectories reaching the detector. The numerical results show that the Lorentz-violating deformation substantially increases the efficiency of the annihilation channel, produces characteristic shifts in the oscillation phase not present in earlier bumblebee configurations, and reshapes the angular dependence of the lensing-induced flavor transition pattern.