Neutrino flavor conversion in random magnetic fields
| Autor: | G. Domokos, S. Kovesi-Domokos |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Magnetic moment Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Dirac (video compression format) Astrophysics (astro-ph) High Energy Physics::Phenomenology FOS: Physical sciences Astrophysics Helicity Magnetic field High Energy Physics - Phenomenology MAJORANA High Energy Physics - Phenomenology (hep-ph) High Energy Physics::Experiment Spin-flip Neutrino Equipartition theorem |
| Zdroj: | Physics Letters B. 410:57-62 |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/s0370-2693(97)00960-x |
| Popis: | If massive neutrinos possess magnetic moments, a magnetic field can cause a spin flip. In the case of Dirac neutrinos the spin flip converts an active neutrino into a sterile one and vice versa. By contrast, if neutrinos are Majorana particles, a spin flip converts them to a neutrino of a different flavor. We examine the behavior of neutrinos in a random magnetic field as it occurs, for instance, in certain astronomical objects, such as an active galactic nucleus. Both Dirac and Majorana neutrinos behave ergodically: independently of their initial density matrix, they tend towards an equipartition of the helicity states. As a result, about half of the Dirac neutrinos produced becomes sterile. For Majorana neutrinos, there will be an approximate equipartition of flavors, independently of the production mechanism. LaTeX, 9 pages. Replaces original version: some missing references supplied |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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