Hidden treasures: Sterile neutrinos as dark matter with miraculous abundance, structure formation for different production mechanisms, and a solution to the problem
Abstract
We discuss numerous mechanisms for production of sterile neutrinos, which can account for all or a fraction of dark matter and which can range from warm to effectively cold dark matter, depending on the cosmological scenario. We investigate production by Higgs boson decay, ( B - L ) gauge boson production at high temperature, as well as production via resonant and nonresonant neutrino oscillations. We calculate the effects on structure formation in these models, some for the first time. If two populations of sterile neutrinos, one warm and one cold, were produced by different mechanisms or if sterile neutrinos account for only a fraction of dark matter, while the remainder is some other cold dark matter particle, the resulting multicomponent dark matter may alleviate some problems in galaxy formation. We examine the x-ray constraints and the candidate signal at 3.5 keV. Finally, we also show that the σ 8 problem can be a signature of fractional dark matter in the form of sterile neutrinos in several mechanisms.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1574041
- Alternate Identifier(s):
- OSTI ID: 1608232
- Grant/Contract Number:
- SC0009937
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 100 Journal Issue: 10; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Abazajian, Kevork N., and Kusenko, Alexander. Hidden treasures: Sterile neutrinos as dark matter with miraculous abundance, structure formation for different production mechanisms, and a solution to the σ 8 problem. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.103513.
Abazajian, Kevork N., & Kusenko, Alexander. Hidden treasures: Sterile neutrinos as dark matter with miraculous abundance, structure formation for different production mechanisms, and a solution to the σ 8 problem. United States. https://doi.org/10.1103/PhysRevD.100.103513
Abazajian, Kevork N., and Kusenko, Alexander. Tue .
"Hidden treasures: Sterile neutrinos as dark matter with miraculous abundance, structure formation for different production mechanisms, and a solution to the σ 8 problem". United States. https://doi.org/10.1103/PhysRevD.100.103513.
@article{osti_1574041,
title = {Hidden treasures: Sterile neutrinos as dark matter with miraculous abundance, structure formation for different production mechanisms, and a solution to the σ 8 problem},
author = {Abazajian, Kevork N. and Kusenko, Alexander},
abstractNote = {We discuss numerous mechanisms for production of sterile neutrinos, which can account for all or a fraction of dark matter and which can range from warm to effectively cold dark matter, depending on the cosmological scenario. We investigate production by Higgs boson decay, ( B - L ) gauge boson production at high temperature, as well as production via resonant and nonresonant neutrino oscillations. We calculate the effects on structure formation in these models, some for the first time. If two populations of sterile neutrinos, one warm and one cold, were produced by different mechanisms or if sterile neutrinos account for only a fraction of dark matter, while the remainder is some other cold dark matter particle, the resulting multicomponent dark matter may alleviate some problems in galaxy formation. We examine the x-ray constraints and the candidate signal at 3.5 keV. Finally, we also show that the σ 8 problem can be a signature of fractional dark matter in the form of sterile neutrinos in several mechanisms.},
doi = {10.1103/PhysRevD.100.103513},
journal = {Physical Review D},
number = 10,
volume = 100,
place = {United States},
year = {2019},
month = {11}
}
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https://doi.org/10.1103/PhysRevD.100.103513
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Works referencing / citing this record:
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