EPJ Web Conf.
Volume 222, 2019The XXIV International Workshop “High Energy Physics and Quantum Field Theory” (QFTHEP 2019)
|Number of page(s)||8|
|Published online||19 November 2019|
Quantum field-theoretical descriprion of neutrino oscillations in T2K experiment
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University,
2 Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
Published online: 19 November 2019
We consider neutrino oscillations in the T2K experiment using a new quantum field-theoretical approach to the description of processes passing at finite space-time intervals. It is based on the Feynman diagram technique in the coordinate representation, supplemented by modified rules of passing to the momentum representation. Effectively this leads to the Feynman propagators in the momentum representation being modified, while the rest of the Feynman rules remain unchanged. The approach does not make use ofwave packets, the initial and final particle states are described by plane waves, which essentially simplifies the calculations. The oscillation fading out due to momentum distribution of the initial particles is taken into account. The obtained results reproduce the predictions of the standard description and confirm that the far detector position corresponds to the first minimum for muon production probability and the first maximum for electron production probability.
© The Authors, published by EDP Sciences, 2019
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