Pseudoscalar - sterile neutrino interactions: reconciling the cosmos with neutrino oscillations

Maria Archidiacono; Stefano Gariazzo; Carlo Giunti; Steen Hannestad; Rasmus Hansen; Marco Laveder; Thomas Tram

doi:10.1088/1475-7516/2016/08/067

Pseudoscalar - sterile neutrino interactions: reconciling the cosmos with neutrino oscillations

Maria Archidiacono
, Stefano Gariazzo
, Carlo Giunti
, Steen Hannestad
, Rasmus Hansen
, Marco Laveder
, Thomas Tram

Institute of Cosmology & Gravitation

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Article number	067
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2016
Issue number	8
DOIs	https://doi.org/10.1088/1475-7516/2016/08/067
Publication status	Published - 30 Aug 2016

Keywords

Cosmological parameters from CMBR
Neutrino masses from cosmology
Neutrino properties
Particle physics - cosmology connection

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10.1088/1475-7516/2016/08/067

1606.07673
This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1475-7516/2016/08/067.
Accepted author manuscript (Post-print), 1.31 MB

Cite this

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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 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.",

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AU - Archidiacono, Maria

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AU - Giunti, Carlo

AU - Hannestad, Steen

AU - Hansen, Rasmus

AU - Laveder, Marco

AU - Tram, Thomas

PY - 2016/8/30

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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

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Pseudoscalar - sterile neutrino interactions: reconciling the cosmos with neutrino oscillations

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Keywords

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