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Title: Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations

Abstract

The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1 eV. 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.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7]
  1. Institute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen University, D-52056 Aachen (Germany)
  2. Department of Physics, University of Torino, Via P. Giuria 1, I–10125 Torino (Italy)
  3. INFN, Sezione di Torino, Via P. Giuria 1, I–10125 Torino (Italy)
  4. Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C (Denmark)
  5. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany)
  6. Dipartimento di Fisica e Astronomia ''G. Galilei'', Università di Padova, and INFN, Sezione di Padova, Via F. Marzolo 8, I–35131 Padova (Italy)
  7. Institute of Gravitation and Cosmology, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth, PO1 3FX (United Kingdom)
Publication Date:
OSTI Identifier:
22679484
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANISOTROPY; INTERACTIONS; MASS; NEUTRINO OSCILLATION; PSEUDOSCALARS; RELICT RADIATION; STERILE NEUTRINOS; UNIVERSE; VISIBLE RADIATION

Citation Formats

Archidiacono, Maria, Gariazzo, Stefano, Giunti, Carlo, Hannestad, Steen, Hansen, Rasmus, Laveder, Marco, and Tram, Thomas, E-mail: archidiacono@physik.rwth-aachen.de, E-mail: gariazzo@to.infn.it, E-mail: giunti@to.infn.it, E-mail: steen@aias.au.dk, E-mail: rasmus@mpi-hd.mpg.de, E-mail: laveder@pd.infn.it, E-mail: thomas.tram@port.ac.uk. Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/08/067.
Archidiacono, Maria, Gariazzo, Stefano, Giunti, Carlo, Hannestad, Steen, Hansen, Rasmus, Laveder, Marco, & Tram, Thomas, E-mail: archidiacono@physik.rwth-aachen.de, E-mail: gariazzo@to.infn.it, E-mail: giunti@to.infn.it, E-mail: steen@aias.au.dk, E-mail: rasmus@mpi-hd.mpg.de, E-mail: laveder@pd.infn.it, E-mail: thomas.tram@port.ac.uk. Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations. United States. doi:10.1088/1475-7516/2016/08/067.
Archidiacono, Maria, Gariazzo, Stefano, Giunti, Carlo, Hannestad, Steen, Hansen, Rasmus, Laveder, Marco, and Tram, Thomas, E-mail: archidiacono@physik.rwth-aachen.de, E-mail: gariazzo@to.infn.it, E-mail: giunti@to.infn.it, E-mail: steen@aias.au.dk, E-mail: rasmus@mpi-hd.mpg.de, E-mail: laveder@pd.infn.it, E-mail: thomas.tram@port.ac.uk. Mon . "Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations". United States. doi:10.1088/1475-7516/2016/08/067.
@article{osti_22679484,
title = {Pseudoscalar—sterile neutrino interactions: reconciling the cosmos with neutrino oscillations},
author = {Archidiacono, Maria and Gariazzo, Stefano and Giunti, Carlo and Hannestad, Steen and Hansen, Rasmus and Laveder, Marco and Tram, Thomas, E-mail: archidiacono@physik.rwth-aachen.de, E-mail: gariazzo@to.infn.it, E-mail: giunti@to.infn.it, E-mail: steen@aias.au.dk, E-mail: rasmus@mpi-hd.mpg.de, E-mail: laveder@pd.infn.it, E-mail: thomas.tram@port.ac.uk},
abstractNote = {The Short BaseLine (SBL) neutrino oscillation anomalies hint at the presence of a sterile neutrino with a mass of around 1 eV. 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.},
doi = {10.1088/1475-7516/2016/08/067},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 08,
volume = 2016,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2016},
month = {Mon Aug 01 00:00:00 EDT 2016}
}