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Title: Freeze-in dark matter from a minimal B - L model and possible grand unification

Abstract

We show that a minimal local $B-L$ symmetry extension of the standard model can provide a unified description of both neutrino mass and dark matter. In our model, $B-L$ breaking is responsible for neutrino masses via the seesaw mechanism, whereas the real part of the $B-L$ breaking Higgs field (called $¥sigma$ here) plays the role of a freeze-in dark matter candidate for a wide parameter range. Since the $¥sigma$-particle is unstable, for it to qualify as dark matter, its lifetime must be longer than $$10^{25}$$ seconds implying that the $B-L$ gauge coupling must be very small. This in turn implies that the dark matter relic density must arise from the freeze-in mechanism. The dark matter lifetime bound combined with dark matter relic density gives a lower bound on the $B-L$ gauge boson mass in terms of the dark matter mass. We point out parameter domains where the dark matter mass can be both in the keV to MeV range as well as in the PeV range. We discuss ways to test some parameter ranges of this scenario in collider experiments. Finally, we show that if instead of $B-L$, we consider the extra $U(1)$ generator to be $$-4I_{3R}+3(B-L)$$, the basic phenomenology remains unaltered and for certain gauge coupling ranges, the model can be embedded into a five-dimensional $SO(10)$ grand unified theory.

Authors:
; ORCiD logo
Publication Date:
Research Org.:
Univ. of Alabama, Tuscaloosa, AL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
OSTI Identifier:
1633698
Alternate Identifier(s):
OSTI ID: 1633711
Grant/Contract Number:  
SC0012447; PHY-1620074; PHY-1914631
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 11; 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

Mohapatra, Rabindra N., and Okada, Nobuchika. Freeze-in dark matter from a minimal B-L model and possible grand unification. United States: N. p., 2020. Web. doi:10.1103/PhysRevD.101.115022.
Mohapatra, Rabindra N., & Okada, Nobuchika. Freeze-in dark matter from a minimal B-L model and possible grand unification. United States. doi:https://doi.org/10.1103/PhysRevD.101.115022
Mohapatra, Rabindra N., and Okada, Nobuchika. Wed . "Freeze-in dark matter from a minimal B-L model and possible grand unification". United States. doi:https://doi.org/10.1103/PhysRevD.101.115022.
@article{osti_1633698,
title = {Freeze-in dark matter from a minimal B-L model and possible grand unification},
author = {Mohapatra, Rabindra N. and Okada, Nobuchika},
abstractNote = {We show that a minimal local $B-L$ symmetry extension of the standard model can provide a unified description of both neutrino mass and dark matter. In our model, $B-L$ breaking is responsible for neutrino masses via the seesaw mechanism, whereas the real part of the $B-L$ breaking Higgs field (called $¥sigma$ here) plays the role of a freeze-in dark matter candidate for a wide parameter range. Since the $¥sigma$-particle is unstable, for it to qualify as dark matter, its lifetime must be longer than $10^{25}$ seconds implying that the $B-L$ gauge coupling must be very small. This in turn implies that the dark matter relic density must arise from the freeze-in mechanism. The dark matter lifetime bound combined with dark matter relic density gives a lower bound on the $B-L$ gauge boson mass in terms of the dark matter mass. We point out parameter domains where the dark matter mass can be both in the keV to MeV range as well as in the PeV range. We discuss ways to test some parameter ranges of this scenario in collider experiments. Finally, we show that if instead of $B-L$, we consider the extra $U(1)$ generator to be $-4I_{3R}+3(B-L)$, the basic phenomenology remains unaltered and for certain gauge coupling ranges, the model can be embedded into a five-dimensional $SO(10)$ grand unified theory.},
doi = {10.1103/PhysRevD.101.115022},
journal = {Physical Review D},
number = 11,
volume = 101,
place = {United States},
year = {2020},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1103/PhysRevD.101.115022

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