https://doi.org/10.1140/epjc/s10052-023-11867-3
Regular Article - Theoretical Physics
Neutrino oscillations in the interaction picture
1
Dipartimento di Fisica, Università di Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy
2
INFN Sezione di Napoli, Gruppo Collegato di Salerno, Salerno, Italy
3
Institute of Physics, Jan-Kochanowski University, ul. Uniwersytecka 7, 25-406, Kielce, Poland
4
Institute for Theoretical Physics, J. W. Goethe University, Max-von-Laue-Straße 1, 60438, Frankfurt, Germany
5
Instituto de Fisica Gleb Wataghin-UNICAMP, Campinas, 13083-859, SP, Brazil
Received:
24
May
2023
Accepted:
25
July
2023
Published online:
19
August
2023
We study the mixing of different kind of fields (scalar in 0+1D, scalar in 3+1D, fermion in 3+1D) treating the mixing term as an interaction. To this aim, we employ the usual perturbative series in the interaction picture. We find that expression for flavor changing probability exhibits corrections with respect to the usual quantum mechanical (e.g. neutrino) oscillation formula, in agreement with the result previously obtained in the non-perturbative flavor Fock space approach.
© The Author(s) 2023
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