Speaker
Description
Abstract
Nowadays the standard way to describe neutrino oscillations is the quantum-mechanical approach in terms of plane waves, because the current description of the phenomenon within quantum field theory with the help of localized wave packets is very bulky [1]. However, there was an earlier attempt to describe neutrino oscillations within the standard Feynman diagram technique [2]. We elaborate upon this description and show that the processes of neutrino oscillations can be consistently described in the framework of a new quantum field-theoretical approach without use of the neutrino flavor states and wave packets. It is based on the Feynman diagram technique with a modified distance-dependent propagator, which takes into account the geometry of neutrino oscillation experiments [3,4]. The advantages of this description are physical clearness and technical simplicity. Within this approach, we discuss specific examples of neutrino oscillation processes in vacuum and a magnetic field, where the neutrinos are detected through the weak charged- and neutral-current interactions [5].
References
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- I.Yu. Kobzarev, B.V. Martemyanov, L.B. Okun and M.G. Shchepkin, Sum rules for neutrino oscillations, Sov. J. Nucl. Phys. 35, 708 (1982).
- V.O. Egorov and I.P. Volobuev, Neutrino oscillation processes in a quantum-field-theoretical approach, Phys. Rev. D 97, no.9, 093002 (2018).
- V.O. Egorov and I.P. Volobuev, Coherence length of neutrino oscillations in a quantum field-theoretical approach, Phys. Rev. D 100, no.3, 033004 (2019).
- V. Egorov and I. Volobuev, Quantum field-theoretical description of neutrino oscillations in magnetic field, arXiv:2107.11570 [hep-ph].
