Faculty of Physics
M.V.Lomonosov Moscow State University

Description of neutrino oscillations in matter in the framework of quantum field theory

I. P. Volobuev, V. O. Egorov

Memoirs of the Faculty of Physics 2023. N 4.

  • Article

Within the framework of the perturbative quantum field-theoretical approach with the distance-dependent propagator, neutrino oscillations in matter are considered. In the approximation of two neutrino flavors, the distance-dependent propagator is constructed that describes the propagation of neutrinos in a stationary non-polarized homogeneous medium. Using this propagator, the corresponding probability of the neutrino oscillation process is found, where the neutrinos are detected through the weak charged- and neutral-current interactions. It is shown that the results coincide with those obtained in the framework of the standard quantum-mechanical description. Several specific examples of processes are considered and the MSW effect is discussed.

Received: 2023 May 18
Approved: 2023 August 1
03.70.+k Theory of quantized fields
11.10.-z Field theory
14.60.Pq Neutrino mass and mixing
I. P. Volobuev, V. O. Egorov
$^1$D.V.Scobeltsyn Institute of Nuclear Physics,Lomonosov Moscow State University,
Issue 4, 2023

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