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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/127556
Effects of the neutrino mass splitting on the non-linear matter power spectrum
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We have performed cosmological N-body simulations which include the effect of the masses of the individual neutrino species. The simulations were aimed at studying the effect of different neutrino hierarchies on the matter power spectrum. Compared to the linear theory predictions, we find that nonlinearities enhance the effect of hierarchy on the matter power spectrum at mildly nonlinear scales. The maximum difference between the different hierarchies is about 0.5% for a sum of neutrino masses of 0.1 eV. Albeit this is a small effect, it is potentially measurable from upcoming surveys. In combination with neutrinoless double-β decay experiments, this opens up the possibility of using the sky to determine if neutrinos are Majorana or Dirac fermions.
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WAGNER, Christian, VERDE, Licia and JIMÉNEZ, Raúl (Jiménez Tellado). Effects of the neutrino mass splitting on the non-linear matter power spectrum. Astrophysical Journal Letters. 2012. Vol. 752, num. 2, pags. 31. ISSN 2041-8205. [consulted: 10 of June of 2026]. Available at: https://hdl.handle.net/2445/127556