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

Title: Visible sterile neutrinos as the earliest relic probes of cosmology

Abstract

A laboratory detection of a sterile neutrino could provide the first indication of the evolution of the Universe before Big-Bang Nucleosynthesis (BBN), an epoch yet untested. Such "visible" sterile neutrinos are observable in upcoming experiments such as KATRIN/TRISTAN and HUNTER in the keV mass range and PTOLEMY and others in the eV mass range. A set of standard assumptions is typically made about cosmology before the temperature of the Universe was 5 MeV. However, non-standard pre-BBN cosmologies based on alternative assumptions could arise in motivated theoretical models and are equally in agreement with all existing data. We revisit the production of sterile neutrinos of mass 0.01 eV to 1 MeV in two examples of such models: scalar-tensor and low reheating temperature pre-BBN cosmologies. In both of them, the putative 3.5 keV X-ray signal line corresponds to a sterile neutrino with a mixing large enough to be tested in upcoming laboratory experiments. Additionally, the cosmological/astrophysical upper limits on active-sterile neutrino mixings are significantly weaker than in the standard pre-BBN cosmology, which shows that these limits are not robust. For example, in the scalar-tensor case the potential signal regions implied by the LSND and MiniBooNE short-baseline as well as the DANSS andmore » NEOS reactor experiments are entirely not bound by cosmological restrictions. Our work highlights that sterile neutrinos may constitute a sensitive probe of the pre-BBN epoch.« less

Authors:
ORCiD logo; ORCiD logo;
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:
1576037
Alternate Identifier(s):
OSTI ID: 1608825
Grant/Contract Number:  
SC0009937
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 800 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Gelmini, Graciela B., Lu, Philip, and Takhistov, Volodymyr. Visible sterile neutrinos as the earliest relic probes of cosmology. Netherlands: N. p., 2020. Web. doi:10.1016/j.physletb.2019.135113.
Gelmini, Graciela B., Lu, Philip, & Takhistov, Volodymyr. Visible sterile neutrinos as the earliest relic probes of cosmology. Netherlands. doi:10.1016/j.physletb.2019.135113.
Gelmini, Graciela B., Lu, Philip, and Takhistov, Volodymyr. Wed . "Visible sterile neutrinos as the earliest relic probes of cosmology". Netherlands. doi:10.1016/j.physletb.2019.135113.
@article{osti_1576037,
title = {Visible sterile neutrinos as the earliest relic probes of cosmology},
author = {Gelmini, Graciela B. and Lu, Philip and Takhistov, Volodymyr},
abstractNote = {A laboratory detection of a sterile neutrino could provide the first indication of the evolution of the Universe before Big-Bang Nucleosynthesis (BBN), an epoch yet untested. Such "visible" sterile neutrinos are observable in upcoming experiments such as KATRIN/TRISTAN and HUNTER in the keV mass range and PTOLEMY and others in the eV mass range. A set of standard assumptions is typically made about cosmology before the temperature of the Universe was 5 MeV. However, non-standard pre-BBN cosmologies based on alternative assumptions could arise in motivated theoretical models and are equally in agreement with all existing data. We revisit the production of sterile neutrinos of mass 0.01 eV to 1 MeV in two examples of such models: scalar-tensor and low reheating temperature pre-BBN cosmologies. In both of them, the putative 3.5 keV X-ray signal line corresponds to a sterile neutrino with a mixing large enough to be tested in upcoming laboratory experiments. Additionally, the cosmological/astrophysical upper limits on active-sterile neutrino mixings are significantly weaker than in the standard pre-BBN cosmology, which shows that these limits are not robust. For example, in the scalar-tensor case the potential signal regions implied by the LSND and MiniBooNE short-baseline as well as the DANSS and NEOS reactor experiments are entirely not bound by cosmological restrictions. Our work highlights that sterile neutrinos may constitute a sensitive probe of the pre-BBN epoch.},
doi = {10.1016/j.physletb.2019.135113},
journal = {Physics Letters B},
number = C,
volume = 800,
place = {Netherlands},
year = {2020},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2019.135113

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Save / Share:

Works referencing / citing this record:

Leptogenesis in fast expanding Universe
journal, March 2020

  • Chen, Shao-Long; Banik, Amit Dutta; Liu, Ze-Kun
  • Journal of Cosmology and Astroparticle Physics, Vol. 2020, Issue 03
  • DOI: 10.1088/1475-7516/2020/03/009