TY - JOUR
T1 - Pseudoscalar - sterile neutrino interactions
T2 - reconciling the cosmos with neutrino oscillations
AU - Archidiacono, Maria
AU - Gariazzo, Stefano
AU - Giunti, Carlo
AU - Hannestad, Steen
AU - Hansen, Rasmus
AU - Laveder, Marco
AU - Tram, Thomas
PY - 2016/8/30
Y1 - 2016/8/30
N2 - The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1eV. However, such a neutrino is incompatible with cosmological data, in particular observations of the Cosmic Microwave Background (CMB) anisotropies. However, this conclusion can change by invoking new physics. One possibility is to introduce a secret interaction in the sterile neutrino sector mediated by a light pseudoscalar. In this pseudoscalar model, CMB data prefer a sterile neutrino mass that is fully compatible with the mass ranges suggested by SBL anomalies. In addition, this model predicts a value of the Hubble parameter which is completely consistent with local measurements.
AB - The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1eV. However, such a neutrino is incompatible with cosmological data, in particular observations of the Cosmic Microwave Background (CMB) anisotropies. However, this conclusion can change by invoking new physics. One possibility is to introduce a secret interaction in the sterile neutrino sector mediated by a light pseudoscalar. In this pseudoscalar model, CMB data prefer a sterile neutrino mass that is fully compatible with the mass ranges suggested by SBL anomalies. In addition, this model predicts a value of the Hubble parameter which is completely consistent with local measurements.
KW - Cosmological parameters from CMBR
KW - Neutrino masses from cosmology
KW - Neutrino properties
KW - Particle physics - cosmology connection
UR - http://www.scopus.com/inward/record.url?scp=85012284817&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2016/08/067
DO - 10.1088/1475-7516/2016/08/067
M3 - Article
AN - SCOPUS:85012284817
SN - 1475-7516
VL - 2016
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 8
M1 - 067
ER -