Quantum Mechanics of Neutrino Oscillations

TL;DR

This paper discusses the theoretical foundations of neutrino oscillations, emphasizing the importance of Lorentz invariance and wave packet descriptions for understanding neutrino flavor changes.

Contribution

It highlights the necessity of wave packet treatment and Lorentz invariance considerations in the theoretical description of neutrino oscillations.

Findings

Neutrino flavor states are superpositions of different mass eigenstates.

Lorentz invariance constrains the energy and momentum relations of neutrinos.

Wave packet approach is essential for accurate neutrino oscillation physics.

Abstract

Subtle problems in the theory of neutrino oscillations in vacuum are discussed. It is shown that Lorentz invariance implies that in general flavor neutrinos in oscillation experiments are superpositions of massive neutrinos with different energies and different momenta. It is argued that a wave packet description of massive neutrinos is necessary in order to understand the physics of neutrino oscillations.