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arXiv · 2311.11875

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

Ivan Dadić·Dubravko Klabučar
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Abstract

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.

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Ivan Dadić, Dubravko Klabučar. 2023-11-20. Neutrino Oscillations in Finite Time Path Out-of-Equilibrium Thermal Field Theory. https://doi.org/10.3390/sym15111970

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