Inhomogeneous Kinetic Equation for Mixed Neutrinos: Tracing the Missing Energy.

Fiorillo, Damiano F G; Raffelt, Georg G; Sigl, Günter

Fiorillo, Damiano F G; Raffelt, Georg G; Sigl, Günter.

Afiliación

Fiorillo DFG; Niels Bohr International Academy, <a href="https://ror.org/035b05819">Niels Bohr Institute</a>, University of Copenhagen, 2100 Copenhagen, Denmark.
Raffelt GG; <a href="https://ror.org/0079jjr10">Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)</a>, Boltzmannstr. 8, 85748 Garching, Germany.
Sigl G; <a href="https://ror.org/00g30e956">Universität Hamburg</a>, II. Institut für Theoretische Physik, 22761 Hamburg, Germany.

Phys Rev Lett ; 133(2): 021002, 2024 Jul 12.

Article en En | MEDLINE | ID: mdl-39073929

ABSTRACT

ABSTRACT

Flavor-dependent neutrino transport is described by a well-known kinetic equation for occupation-number matrices in flavor space. However, in the context of fast flavor conversion, we identify an unforeseen predicament the pivotal self-induced exponential growth of small inhomogeneities strongly violates conservation of neutrino-neutrino refractive energy. We prove that it is traded with the huge reservoir of neutrino kinetic energy through gradients of neutrino flavor coherence (the off-diagonal piece of the flavor density matrix) and derive the missing gradient terms. The usual equations remain sufficient to describe flavor evolution, at the cost of renouncing energy conservation, which cannot play any role in explaining the numerically observed final state.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2024 Tipo del documento: Article País de afiliación: Dinamarca Pais de publicación: Estados Unidos

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