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Title: SU(5)×U(1) X grand unification with minimal seesaw and Z ′ -portal dark matter

Abstract

We propose a grand unified SU ( 5 ) × U ( 1 ) X model, where the standard SU(5) grand unified theory is supplemented by minimal seesaw and a right-handed neutrino dark matter with an introduction of a global Z 2 -parity. In the presence of three right-handed neutrinos (RHNs), the model is free from all gauge and mixed-gravitational anomalies. The SU(5) symmetry is broken into the Standard Model (SM) gauge group at M GUT 4 × 10 16 GeV in the standard manner, while the U(1) X symmetry breaking occurs at the TeV scale, which generates the TeV-scale mass of the U(1) X gauge boson ( Z ' boson) and the three Majorana RHNs. A unique Z 2 -odd RHN is stable and serves as the dark matter (DM) in the present Universe, while the remaining two RHNs work to generate the SM neutrino masses through the minimal seesaw. We investigate the Z ' -portal RHN DM scenario in this model context. We find that the constraints from the DM relic abundance, and the Z ' boson search at the Large Hadron Collider (LHC), and the perturbativity bound on the U(1) X gauge coupling are complementary to narrow down the allowed parameter region in the range of 3.0 m Z ' [ TeV ] 9.2 for the Z ' boson mass. The allowed region for m Z ' 5 TeV will be fully covered by the future LHC experiments. We also briefly discuss the successful implementation of Baryogenesis and cosmological inflation scenarios in the present model.

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) (SC-25)
OSTI Identifier:
1426826
Alternate Identifier(s):
OSTI ID: 1499154
Grant/Contract Number:  
[SC0012447]
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
[Journal Name: Physics Letters B Journal Volume: 780 Journal Issue: C]; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. SU(5)×U(1) X grand unification with minimal seesaw and Z ′ -portal dark matter. Netherlands: N. p., 2018. Web. doi:10.1016/j.physletb.2018.03.031.
Okada, Nobuchika, Okada, Satomi, & Raut, Digesh. SU(5)×U(1) X grand unification with minimal seesaw and Z ′ -portal dark matter. Netherlands. doi:10.1016/j.physletb.2018.03.031.
Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. Tue . "SU(5)×U(1) X grand unification with minimal seesaw and Z ′ -portal dark matter". Netherlands. doi:10.1016/j.physletb.2018.03.031.
@article{osti_1426826,
title = {SU(5)×U(1) X grand unification with minimal seesaw and Z ′ -portal dark matter},
author = {Okada, Nobuchika and Okada, Satomi and Raut, Digesh},
abstractNote = {We propose a grand unified SU(5)×U(1)X model, where the standard SU(5) grand unified theory is supplemented by minimal seesaw and a right-handed neutrino dark matter with an introduction of a global Z2-parity. In the presence of three right-handed neutrinos (RHNs), the model is free from all gauge and mixed-gravitational anomalies. The SU(5) symmetry is broken into the Standard Model (SM) gauge group at MGUT≃4×1016GeV in the standard manner, while the U(1)X symmetry breaking occurs at the TeV scale, which generates the TeV-scale mass of the U(1)X gauge boson (Z' boson) and the three Majorana RHNs. A unique Z2-odd RHN is stable and serves as the dark matter (DM) in the present Universe, while the remaining two RHNs work to generate the SM neutrino masses through the minimal seesaw. We investigate the Z'-portal RHN DM scenario in this model context. We find that the constraints from the DM relic abundance, and the Z' boson search at the Large Hadron Collider (LHC), and the perturbativity bound on the U(1)X gauge coupling are complementary to narrow down the allowed parameter region in the range of 3.0≤mZ'[TeV]≤9.2 for the Z' boson mass. The allowed region for mZ'≤5TeV will be fully covered by the future LHC experiments. We also briefly discuss the successful implementation of Baryogenesis and cosmological inflation scenarios in the present model.},
doi = {10.1016/j.physletb.2018.03.031},
journal = {Physics Letters B},
number = [C],
volume = [780],
place = {Netherlands},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2018.03.031

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Cited by: 8 works
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Figures / Tables:

Table 1 Table 1: The particle content of the minimal U(1)X extended SM with Z2-parity. In addition to the SM particle content (i = 1, 2, 3), the three RHNs (N jR ( j = 1, 2) and NR ) and the U(1)X Higgs field (Φ) are introduced. The unification into SU(5)more » × U(1)X is achieved only for xH = −4/5, and xH is quantized in our model.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.