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Multi-angle effects in collective supernova neutrino oscillations
Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas +2
We study two-flavor collective neutrino oscillations in the dense-neutrino region above the neutrino sphere in a supernova (SN). The angular dependence of the neutrino-neutrino int…
Mu-tau neutrino refraction and collective three-flavor transformations in supernovae
Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas +2
We study three-flavor collective neutrino transformations in the dense-neutrino region above the neutrino sphere of a supernova core. We find that two-flavor conversions driven by…
Adiabaticity and spectral splits in collective neutrino transformations
Georg G. Raffelt, Alexei Yu. Smirnov
Neutrinos streaming off a supernova core transform collectively by neutrino-neutrino interactions, leading to "spectral splits" where an energy E_split divides the transformed spec…
Unparticle constraints from SN1987A
Steen Hannestad, Georg Raffelt, Yvonne Y. Y. Wong
The existence of an unparticle sector, weakly coupled to the standard model, would have a profound impact on supernova (SN) physics. Emission of energy into the unparticle sector f…
Cosmological constraints on neutrino plus axion hot dark matter
Steen Hannestad, Alessandro Mirizzi, Georg G. Raffelt +1
We use observations of the cosmological large-scale structure to derive limits on two-component hot dark matter consisting of mass-degenerate neutrinos and hadronic axions, both co…
Decoherence in supernova neutrino transformations suppressed by deleptonization
Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas +2
In the dense-neutrino region at 50-400 km above the neutrino sphere in a supernova, neutrino-neutrino interactions cause large flavor transformations. We study when the multi-angle…