Future CMB Stage IV measurements of N_eff will detect or exclude thermally populated right-handed neutrino partners in most Dirac-neutrino models, constraining new gauge bosons and scalar mediators more strongly than laboratory searches.
Constraints on Neutrino-Neutrino Interactions from Primordial Nucleosynthesis
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We use the constraints arising from primordial nucleosynthesis to bound the strength $F$ of non-standard neutrino-neutrino interactions, when the right-handed neutrinos participate in the interaction. We find $F < 3 \times 10^{-3}\ G_F$, which is five orders of magnitude more stringent than the limit obtained using LEP data. We also show that secret interactions of neutrinos mediated by massless particles must have a coupling $f$ less than $2 \times 10^{-5}$. This also ameliorates previous limits in the literature.
fields
hep-ph 1years
2019 1verdicts
ACCEPT 1representative citing papers
citing papers explorer
-
Observing Dirac neutrinos in the cosmic microwave background
Future CMB Stage IV measurements of N_eff will detect or exclude thermally populated right-handed neutrino partners in most Dirac-neutrino models, constraining new gauge bosons and scalar mediators more strongly than laboratory searches.