Neutrino oscillations in dense neutrino media

Details Neutrino oscillations in dense neutrino media Neutrino oscillations in dense neutrino media

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..623..202p&link_type=abstract

AIP Conference Proceedings, vol. 623, iss. no. 1, p. 202-208

Physics

Cosmology, Elementary Particle Interactions, Flavor (Particle Physics), Magnetic Fields, Neutrinos, Oscillations, Particle Spin, Particle Theory, Neutrino Mass And Mixing, Quark And Lepton Masses And Mixing

Scientific paper

In the early universe or in some regions of supernovae, the neutrino refractive index is dominated by the neutrinos themselves. Previous studies found numerically that these self-interactions have the effect of coupling different neutrino modes in such a way as to synchronize the flavor oscillations which otherwise would depend on the energy of a given mode. We provide a simple explanation for this baffling phenomenon in analogy to a system of magnetic dipoles which are coupled by their self-interactions to form one large magnetic dipole which then precesses coherently in a weak external magnetic field. In this picture the synchronized neutrino oscillations are perfectly analogous to the weak-field Zeeman effect in atoms.

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