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Relic density of neutrinos with primordial asymmetries
Sergio Pastor, Teguayco Pinto, Georg Raffelt
We study flavor oscillations in the early universe, assuming primordial neutrino-antineutrino asymmetries. Including collisions and pair processes in the kinetic equations, we not…
Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
The Pierre Auger Collaboration
Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the highest energies, which are correlated with the…
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…
Disentangling neutrino-nucleon cross section and high energy neutrino flux with a km^3 neutrino telescope
E. Borriello, A. Cuoco, G. Mangano +4
The energy--zenith angular event distribution in a neutrino telescope provides a unique tool to determine at the same time the neutrino-nucleon cross section at extreme kinematical…
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…
Massive neutrinos and cosmology
Julien Lesgourgues, Sergio Pastor
The present experimental results on neutrino flavour oscillations provide evidence for non-zero neutrino masses, but give no hint on their absolute mass scale, which is the target…