Work

Three-flavor neutrino oscillations using the phase space approach

Year: 2025

Type: article

Abstract: The phase-space approximation (PSA) approach, originally applied in [] to describe neutrino oscillations from a dense astrophysical source such as a core-collapse supernova in the two-flavor limit, is extended here to describe the more realistic case where neutrinos can oscillate between three different flavors. The approach is successfully validated against the exact solutions up to eight neutrinos. In all cases where the exact solution is feasible, the PSA provides excellent reproduction of the neutrino oscillation dynamics. By replacing the full problem with a set of simple mean-field equations, the PSA offers a versatile, predictive, and easily parallelizable approach for tackling three-flavor problems. This enables the simulation of large-scale neutrino oscillations, as illustrated here with simulations involving up to 300 neutrinos. Even if direct comparison to exact solutions is only feasible for small systems (up to eight neutrinos), where PSA shows excellent agreement, its applicability in the large- N regime appears promising, although a full quantitative validation remains beyond current computational capabilities. Additionally, the method also provides insight into the system’s equilibration properties.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/yr2g-1g2g

Authors: Mariane Mangin-Brinet, Angel Bauge, Denis Lacroix

Institutions: Centre National de la Recherche Scientifique, Laboratoire de Physique Subatomique et de Cosmologie, Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie

Language: English

Topic: Neutrino Physics Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Agence Nationale de la Recherche, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules

Award: G1453097182