Neutrino Oscillations in Finite Time Path Out-of-Equilibrium Thermal Field Theory

• Main Authors: Dadić, Ivan, Klabučar, Dubravko
• Format: Journal Article
• Language: English
• Published: 20-11-2023
• Subjects: Physics - High Energy Physics - Phenomenology
• DOI: 10.48550/arxiv.2311.11875

Symmetry 2023, 15, 1970 We demonstrate that the Finite-Time-Path Field Theory is an adequate tool for
calculating neutrino oscillations. We apply this theory using a mass-mixing
Lagrangian which involves the correct Dirac spin and chirality structure and a
Pontecorvo-Maki-Nakagawa-Sakata (PMNS)-like mixing matrix. The model is exactly
solvable. The Dyson-Schwinger equations transform propagators of the input free
(massless) flavor neutrinos into a linear combination of oscillating (massive)
neutrinos. The results are consistent with the predictions of the PMNS matrix
while allowing for extrapolation to early times.