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Title: MeV sterile neutrinos in low reheating temperature cosmological scenarios

Abstract

It is commonly assumed that the cosmological and astrophysical bounds on the mixings of sterile with active neutrinos are much more stringent than those obtained from laboratory measurements. We point out that in scenarios with a very low reheating temperature T{sub RH}<<100 MeV at the end of (the last episode of) inflation or entropy creation, the abundance of sterile neutrinos becomes greatly suppressed with respect to that obtained within the standard framework. Thus, in this case cosmological bounds become much less stringent than usually assumed, allowing sterile neutrinos to be 'visible' in future experiments. Here, we concentrate on massive (mostly sterile) neutrinos with masses m{sub s}>1 MeV for T{sub RH}{<=}m{sub s}.

Authors:
;  [1]; ;  [2]
  1. Department of Physics and Astronomy, UCLA, Los Angeles, CA 90095 (United States)
  2. IPPP, Department of Physics, Durham University, Durham DH1 3LE (United Kingdom)
Publication Date:
OSTI Identifier:
22156787
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2008; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; ASTROPHYSICS; COSMOLOGY; ENTROPY; INFLATIONARY UNIVERSE; MEV RANGE; NEUTRINOS

Citation Formats

Gelmini, Graciela, Osoba, Efunwande, Palomares-Ruiz, Sergio, and Pascoli, Silvia. MeV sterile neutrinos in low reheating temperature cosmological scenarios. United States: N. p., 2008. Web. doi:10.1088/1475-7516/2008/10/029.
Gelmini, Graciela, Osoba, Efunwande, Palomares-Ruiz, Sergio, & Pascoli, Silvia. MeV sterile neutrinos in low reheating temperature cosmological scenarios. United States. https://doi.org/10.1088/1475-7516/2008/10/029
Gelmini, Graciela, Osoba, Efunwande, Palomares-Ruiz, Sergio, and Pascoli, Silvia. 2008. "MeV sterile neutrinos in low reheating temperature cosmological scenarios". United States. https://doi.org/10.1088/1475-7516/2008/10/029.
@article{osti_22156787,
title = {MeV sterile neutrinos in low reheating temperature cosmological scenarios},
author = {Gelmini, Graciela and Osoba, Efunwande and Palomares-Ruiz, Sergio and Pascoli, Silvia},
abstractNote = {It is commonly assumed that the cosmological and astrophysical bounds on the mixings of sterile with active neutrinos are much more stringent than those obtained from laboratory measurements. We point out that in scenarios with a very low reheating temperature T{sub RH}<<100 MeV at the end of (the last episode of) inflation or entropy creation, the abundance of sterile neutrinos becomes greatly suppressed with respect to that obtained within the standard framework. Thus, in this case cosmological bounds become much less stringent than usually assumed, allowing sterile neutrinos to be 'visible' in future experiments. Here, we concentrate on massive (mostly sterile) neutrinos with masses m{sub s}>1 MeV for T{sub RH}{<=}m{sub s}.},
doi = {10.1088/1475-7516/2008/10/029},
url = {https://www.osti.gov/biblio/22156787}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2008,
place = {United States},
year = {Wed Oct 15 00:00:00 EDT 2008},
month = {Wed Oct 15 00:00:00 EDT 2008}
}