Physics of synchronized neutrino oscillations caused by self-interactions

By S. Pastor, G. Raffelt, D. V. Semikoz. 2001

133 citations recorded by the source corpus.

Institute for Nuclear Research of the Academy of Sciences of Russia,60th October Anniversary Prospect 7a, Moscow 117312, Russia(February 5, 2002)In the early universe or in some regions of supernovae, the neutrino refractive index is dominated bythe neutrinosthemselves. Several previous studieshave found numerically that these self-interactionshave the effect of coupling different neutrino modes in such a way as to synchronize the flavoroscillations which otherwise would depend on the energy of a given mode. We provide a simpleexplanation for this baffling phenomenon in analogy to a system of magnetic dipoles which arecoupled by their self-interactions to form one large magnetic dipole which then precesses coherentlyin a weak external magnetic field. In this picture the synchronized neutrino oscillations are perfectlyanalogous to the weak-field Zeeman effect in atoms.PACS number(s): 14.60.Pq,I. INTRODUCTION

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/50e611f0a4011436e4abc468c54ab81fee4fd230

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In Atomic and Molecular Physics, and Optics

1. G. Raffelt

In Nuclear and High Energy Physics

1. S. Hannestad
2. Y. Wong
3. G. Raffelt
4. R. Hansen
5. S. Chakraborty
6. I. Izaguirre
7. A. Smirnov
8. J. Redondo

Citations in the corpus

• Self-induced conversion in dense neutrino gases : Pendulum in flavor space (2006, unknown): “cillation frequencies. In the spin-precession analogy of flavour oscillations, the flavour polarisation vectors of all neutrino modes form one big spin that precesses in a weak “external magnetic field.” This big spin is held together by the strong “internal magnetic field” formed in flavour space b”
• Self-induced conversion in dense neutrino gases: Pendulum in flavour space (2006, background): “” This big spin is held together by the strong “internal magnetic field” formed in flavour space by the strong neutrino-neutrino interaction [17].”
• Self-induced spectral splits in supernova neutrino fluxes (2007, background): “At large densities, neutrino-neutrino refraction causes nonlinear flavor oscillation phenomena with sometimes perplexing results [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15].”
• Self-induced neutrino flavor conversion without flavor mixing (2016, background): “One is the effect of synchronisation: different modes of the neutrino mean field oscillate in lockstep even though they have different vacuum oscillation frequencies ω = ∆m2/2E [7–11].”