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Title: EFFECTS OF THE NEUTRINO MASS SPLITTING ON THE NONLINEAR MATTER POWER SPECTRUM

Abstract

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-{beta} decay experiments, this opens up the possibility of using the sky to determine if neutrinos are Majorana or Dirac fermions.

Authors:
; ;  [1]
  1. Institut de Ciencies del Cosmos (ICC), Universitat de Barcelona (IEEC-UB), Marti i Franques 1, E08028 Barcelona (Spain)
Publication Date:
OSTI Identifier:
22047735
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 752; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; COSMOLOGY; DOUBLE BETA DECAY; EV RANGE; MASS DIFFERENCE; NEUTRINOS; NONLINEAR PROBLEMS; REST MASS; UNIVERSE

Citation Formats

Wagner, Christian, Verde, Licia, and Jimenez, Raul. EFFECTS OF THE NEUTRINO MASS SPLITTING ON THE NONLINEAR MATTER POWER SPECTRUM. United States: N. p., 2012. Web. doi:10.1088/2041-8205/752/2/L31.
Wagner, Christian, Verde, Licia, & Jimenez, Raul. EFFECTS OF THE NEUTRINO MASS SPLITTING ON THE NONLINEAR MATTER POWER SPECTRUM. United States. doi:10.1088/2041-8205/752/2/L31.
Wagner, Christian, Verde, Licia, and Jimenez, Raul. Wed . "EFFECTS OF THE NEUTRINO MASS SPLITTING ON THE NONLINEAR MATTER POWER SPECTRUM". United States. doi:10.1088/2041-8205/752/2/L31.
@article{osti_22047735,
title = {EFFECTS OF THE NEUTRINO MASS SPLITTING ON THE NONLINEAR MATTER POWER SPECTRUM},
author = {Wagner, Christian and Verde, Licia and Jimenez, Raul},
abstractNote = {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-{beta} decay experiments, this opens up the possibility of using the sky to determine if neutrinos are Majorana or Dirac fermions.},
doi = {10.1088/2041-8205/752/2/L31},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 752,
place = {United States},
year = {2012},
month = {6}
}