Current measurements of the low and high redshift Universe are in tension if
we restrict ourselves to the standard six parameter model of flat LCDM. This
tension has two parts. First, the Planck satellite suggests a higher
normalization of matter perturbations than local measurements of galaxy
clusters. Second, the expansion rate of the Universe today, H_0, derived from
local distance-redshift measurements is significantly higher than that inferred
using the acoustic scale in galaxy surveys and the Planck data as a standard
ruler. The addition of a sterile neutrino species changes the acoustic scale
and brings the two into agreement; meanwhile, adding mass to the active
neutrinos or to a sterile neutrino can suppress the growth of structure,
bringing the cluster data into concordance as well. For our fiducial dataset
combination, with statistical errors for clusters, a model with a massive
sterile neutrino shows 3.5 sigma evidence for a non-zero mass and an even
stronger rejection of the minimal model. A model with massive active neutrinos
and a massless sterile neutrino is similarly preferred. An eV-scale sterile
neutrino mass -- suggested by short baseline and reactor anomalies -- is well
within the allowed range.
Beschreibung
nu-LCDM: Neutrinos reconcile Planck with the Local Universe
%0 Generic
%1 wyman2013nulcdm
%A Wyman, Mark
%A Rudd, Douglas H.
%A Vanderveld, R. Ali
%A Hu, Wayne
%D 2013
%K neutrinos planck reconcile
%T nu-LCDM: Neutrinos reconcile Planck with the Local Universe
%U http://arxiv.org/abs/1307.7715
%X Current measurements of the low and high redshift Universe are in tension if
we restrict ourselves to the standard six parameter model of flat LCDM. This
tension has two parts. First, the Planck satellite suggests a higher
normalization of matter perturbations than local measurements of galaxy
clusters. Second, the expansion rate of the Universe today, H_0, derived from
local distance-redshift measurements is significantly higher than that inferred
using the acoustic scale in galaxy surveys and the Planck data as a standard
ruler. The addition of a sterile neutrino species changes the acoustic scale
and brings the two into agreement; meanwhile, adding mass to the active
neutrinos or to a sterile neutrino can suppress the growth of structure,
bringing the cluster data into concordance as well. For our fiducial dataset
combination, with statistical errors for clusters, a model with a massive
sterile neutrino shows 3.5 sigma evidence for a non-zero mass and an even
stronger rejection of the minimal model. A model with massive active neutrinos
and a massless sterile neutrino is similarly preferred. An eV-scale sterile
neutrino mass -- suggested by short baseline and reactor anomalies -- is well
within the allowed range.
@misc{wyman2013nulcdm,
abstract = {Current measurements of the low and high redshift Universe are in tension if
we restrict ourselves to the standard six parameter model of flat LCDM. This
tension has two parts. First, the Planck satellite suggests a higher
normalization of matter perturbations than local measurements of galaxy
clusters. Second, the expansion rate of the Universe today, H_0, derived from
local distance-redshift measurements is significantly higher than that inferred
using the acoustic scale in galaxy surveys and the Planck data as a standard
ruler. The addition of a sterile neutrino species changes the acoustic scale
and brings the two into agreement; meanwhile, adding mass to the active
neutrinos or to a sterile neutrino can suppress the growth of structure,
bringing the cluster data into concordance as well. For our fiducial dataset
combination, with statistical errors for clusters, a model with a massive
sterile neutrino shows 3.5 sigma evidence for a non-zero mass and an even
stronger rejection of the minimal model. A model with massive active neutrinos
and a massless sterile neutrino is similarly preferred. An eV-scale sterile
neutrino mass -- suggested by short baseline and reactor anomalies -- is well
within the allowed range.},
added-at = {2013-08-28T11:28:46.000+0200},
author = {Wyman, Mark and Rudd, Douglas H. and Vanderveld, R. Ali and Hu, Wayne},
biburl = {https://www.bibsonomy.org/bibtex/27b9f61bbfe834b64d2585653d37e4cff/dkraljic},
description = {nu-LCDM: Neutrinos reconcile Planck with the Local Universe},
interhash = {bf193a7b2ae32b2fd373b3bc6c195812},
intrahash = {7b9f61bbfe834b64d2585653d37e4cff},
keywords = {neutrinos planck reconcile},
note = {cite arxiv:1307.7715Comment: 4 pages, 2 figures},
timestamp = {2013-08-28T11:28:49.000+0200},
title = {nu-LCDM: Neutrinos reconcile Planck with the Local Universe},
url = {http://arxiv.org/abs/1307.7715},
year = 2013
}