TY  - JOUR
AU  - de Salas, P. F.
AU  - Gariazzo, S.
AU  - Martinez-Mirave, P.
AU  - Pastor, S.
AU  - Tortola, M.
PY  - 2021
DA  - 2021//
TI  - Cosmological radiation density with non-standard neutrino-electron interactions
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 136508
EP  - 9pp
VL  - 820
PB  - Elsevier
KW  - Neutrino interactions
KW  - Non-standard neutrino interactions
KW  - Cosmology
KW  - Neutrino oscillations
AB  - Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino de coupling from the cosmic plasma. NSI modify both flavour oscillations through matter effects, and the annihilation and scattering between neutrinos and electrons and positrons in the thermal plasma. In view of the forthcoming cosmological observations, we perform a precision study of the impact of non universal and flavour-changing NSI on the effective number of neutrinos, Neff. We present the variation of Neff arising from the different NSI parameters and discuss the existing degeneracies among them, from cosmology alone and in relation to the current bounds from terrestrial experiments. Even though cosmology is generally less sensitive to NSI than these experiments, we find that future cosmological data would provide competitive and complementary constraints for some of the couplings and their combinations.
SN  - 0370-2693
UR  - https://arxiv.org/abs/2105.08168
UR  - https://doi.org/10.1016/j.physletb.2021.136508
DO  - 10.1016/j.physletb.2021.136508
LA  - English
N1  - WOS:000713101800031
ID  - deSalas_etal2021
ER  -