Nonadiabatic neutrino oscillations reexamined

Journal Article · Tue Feb 01 04:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.49.1404· OSTI ID:5431856

Guzzo, M M; Bellandi, J; Aquino, V M ^[1]

---

1. Instituto de Fisica Gleb Wataghin,'' Universidade Estadual de Campinas, Unicamp 13083-970 Campinas, Sao Paulo (Brazil) Instituto de Fisica Teorica, Universidade Estadual Paulista, Unesp, Rua Pamplona, 145-01405 Sao Paulo, Sao Paulo (Brazil) Departamento de Fisica, Universidade Estadual de Londrina, 86000-970 Londrina, Parana (Brazil)

Employing the Feynman procedure of ordered exponential operators and the stationary phase method to evaluate the multiple integrals involved, we calculate the level-crossing probability and analyze the role of a resonance in the evolution of a two-level neutrino system. We compare this procedure with more conventional ones, such as Landau's method and the ansatz of Kuo and Pantaleone and Petcov. We verify that our results reproduce the correct extreme nonadiabatic limit and give the standard solutions in the adiabatic regime for any arbitrary matter density distributions. We discuss in particular the case of solar neutrino propagation using the standard solar model predictions for the matter distribution in the Sun.

• OSTI ID: 5431856
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:3; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662430* -- Properties of Leptons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ADIABATIC PROCESSES
COSMIC RAY PROPAGATION
DENSITY
DISPERSION RELATIONS
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MASS DISTRIBUTION
MASSLESS PARTICLES
NEUTRINO OSCILLATION
NEUTRINOS
PHYSICAL PROPERTIES
RADIATIONS
RESONANCE
SOLAR NEUTRINOS
SOLAR PARTICLES
SOLAR RADIATION
SPATIAL DISTRIBUTION
STELLAR RADIATION