skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Sterile neutrino dark matter: Weak interactions in the strong coupling epoch

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1294719
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 4; Related Information: CHORUS Timestamp: 2016-08-15 18:10:01; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Venumadhav, Tejaswi, Cyr-Racine, Francis-Yan, Abazajian, Kevork N., and Hirata, Christopher M. Sterile neutrino dark matter: Weak interactions in the strong coupling epoch. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.043515.
Venumadhav, Tejaswi, Cyr-Racine, Francis-Yan, Abazajian, Kevork N., & Hirata, Christopher M. Sterile neutrino dark matter: Weak interactions in the strong coupling epoch. United States. doi:10.1103/PhysRevD.94.043515.
Venumadhav, Tejaswi, Cyr-Racine, Francis-Yan, Abazajian, Kevork N., and Hirata, Christopher M. 2016. "Sterile neutrino dark matter: Weak interactions in the strong coupling epoch". United States. doi:10.1103/PhysRevD.94.043515.
@article{osti_1294719,
title = {Sterile neutrino dark matter: Weak interactions in the strong coupling epoch},
author = {Venumadhav, Tejaswi and Cyr-Racine, Francis-Yan and Abazajian, Kevork N. and Hirata, Christopher M.},
abstractNote = {},
doi = {10.1103/PhysRevD.94.043515},
journal = {Physical Review D},
number = 4,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.94.043515

Citation Metrics:
Cited by: 10works
Citation information provided by
Web of Science

Save / Share:
  • Sterile neutrinos are attractive dark matter candidates. Their parameter space of mass and mixing angle has not yet been fully tested despite intensive efforts that exploit their gravitational clustering properties and radiative decays. We use the limits on gamma-ray line emission from the Galactic center region obtained with the SPI spectrometer on the INTEGRAL satellite to set new constraints, which improve on the earlier bounds on mixing by more than 2 orders of magnitude, and thus strongly restrict a wide and interesting range of models.
  • Cited by 6
  • We propose an extension of the standard model with a U(1){sub B-L} global symmetry that accommodates radiative neutrino masses along with dark matter and leptogenesis. The observed matter-antimatter asymmetry of the Universe is generated through the leptogenesis route keeping the U(1){sub B-L} symmetry intact. The B-L global symmetry is then softly broken, providing the subeV neutrino masses. The model then incorporates a MeV scale sterile-neutrino-like dark matter.
  • The generation of lepton asymmetry below the electroweak scale has a considerable impact on production of dark matter sterile neutrinos. Oscillations or decays of the heavier sterile neutrinos in the neutrino minimal standard model can give rise to the requisite lepton asymmetry, provided the masses of the heavier neutrinos are sufficiently degenerate. We study the renormalization group evolution of the mass difference of these singlet fermions to understand the degree of necessary fine-tuning. We construct an example of the model that can lead to a technically natural realization of this low-energy degeneracy.