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Non-unitary three-neutrino mixing in the early Universe
Stefano Gariazzo, Pablo Martínez-Miravé, Olga Mena +2
Deviations from unitarity in the three-neutrino mixing canonical picture are expected in many physics scenarios beyond the Standard Model. The mixing of new heavy neutral leptons w…
Cosmological radiation density with non-standard neutrino-electron interactions
Pablo Martínez-Miravé
Non-standard interactions (NSI) between neutrinos and electrons can significantly modify the decoupling of neutrinos from the plasma. These interactions have two effects on the ove…
Cosmological radiation density with non-standard neutrino-electron interactions
Pablo F. de Salas, Stefano Gariazzo, Pablo Martínez-Miravé +2
Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino decoupling from the cosmic plasma. NSI modify both flavour oscillations through m…
Towards a precision calculation of in the Standard Model II: Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED
Jack J. Bennett, Gilles Buldgen, Pablo F. de Salas +4
We present in this work a new calculation of the standard-model benchmark value for the effective number of neutrinos, , that quantifies the cosmological neut…
Constraining the invisible neutrino decay with KM3NeT-ORCA
P. F. de Salas, S. Pastor, C. A. Ternes +2
Several theories of particle physics beyond the Standard Model consider that neutrinos can decay. In this work we assume that the standard mechanism of neutrino oscillations is alt…
Relic neutrino decoupling with flavour oscillations revisited
Pablo F. de Salas, Sergio Pastor
We study the decoupling process of neutrinos in the early universe in the presence of three-flavour oscillations. The evolution of the neutrino spectra is found by solving the corr…