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Title: Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$

Abstract

We propose a simple non-supersymmetric grand unified theory (GUT) based on the gauge group SO(10)×U(1) ψ. The model includes 3 generations of fermions in 16 (+1), 10 (–2) and 1 (+4) representations. The 16-plets contain Standard Model (SM) fermions plus right-handed neutrinos, and the 10-plet and the singlet fermions are introduced to make the model anomaly-free. Gauge coupling unification at M GUT≃5×10 15 - 10 16 GeV is achieved by including an intermediate Pati–Salam breaking at M I ≃ 10 12 – 10 11 GeV, which is a natural scale for the seesaw mechanism. For M I ≃ 10 12 – 10 11, proton decay will be tested by the Hyper-Kamiokande experiment. The extra fermions acquire their masses from U(1) ψ symmetry breaking, and a U(1) ψ Higgs field drives a successful inflection-point inflation with a low Hubble parameter during inflation, H inf << M I. Hence, cosmologically dangerous monopoles produced from SO(10) and PS breakings are diluted away. This is the first SO(10) model we are aware of in which relatively light intermediate mass (~10 10 – 10 12 GeV) primordial monopoles can be adequately suppressed. The reheating temperature after inflation can be high enough for successful leptogenesis. Withmore » the Higgs field contents of our model, a Z 2 symmetry remains unbroken after GUT symmetry breaking, and the lightest mass eigenstate among linear combinations of the 10-plet and the singlet fermions serves as a Higgs-portal dark matter (DM). We identify the parameter regions to reproduce the observed DM relic density while satisfying the current constraint from the direct DM detection experiments. Here, the present allowed region will be fully covered by the future direct detection experiments such as LUX-ZEPLIN DM experiment. In the presence of the extra fermions, the SM Higgs potential is stabilized up to M I.« less

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); Bartol Research
OSTI Identifier:
1619370
Alternate Identifier(s):
OSTI ID: 1656810
Grant/Contract Number:  
SC0012447; SC0013880; BART-462114
Resource Type:
Journal Article: Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 79 Journal Issue: 12; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
Germany
Language:
English

Citation Formats

Okada, Nobuchika, Raut, Digesh, and Shafi, Qaisar. Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$. Germany: N. p., 2019. Web. doi:10.1140/epjc/s10052-019-7550-5.
Okada, Nobuchika, Raut, Digesh, & Shafi, Qaisar. Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$. Germany. doi:10.1140/epjc/s10052-019-7550-5.
Okada, Nobuchika, Raut, Digesh, and Shafi, Qaisar. Sat . "Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$". Germany. doi:10.1140/epjc/s10052-019-7550-5.
@article{osti_1619370,
title = {Inflation, proton decay, and Higgs-portal dark matter in $$SO(10) \times U(1)_\psi $$},
author = {Okada, Nobuchika and Raut, Digesh and Shafi, Qaisar},
abstractNote = {We propose a simple non-supersymmetric grand unified theory (GUT) based on the gauge group SO(10)×U(1)ψ. The model includes 3 generations of fermions in 16 (+1), 10 (–2) and 1 (+4) representations. The 16-plets contain Standard Model (SM) fermions plus right-handed neutrinos, and the 10-plet and the singlet fermions are introduced to make the model anomaly-free. Gauge coupling unification at MGUT≃5×1015 - 1016 GeV is achieved by including an intermediate Pati–Salam breaking at MI ≃ 1012 – 1011 GeV, which is a natural scale for the seesaw mechanism. For MI ≃ 1012 – 1011, proton decay will be tested by the Hyper-Kamiokande experiment. The extra fermions acquire their masses from U(1)ψ symmetry breaking, and a U(1)ψ Higgs field drives a successful inflection-point inflation with a low Hubble parameter during inflation, Hinf << MI. Hence, cosmologically dangerous monopoles produced from SO(10) and PS breakings are diluted away. This is the first SO(10) model we are aware of in which relatively light intermediate mass (~1010 – 1012 GeV) primordial monopoles can be adequately suppressed. The reheating temperature after inflation can be high enough for successful leptogenesis. With the Higgs field contents of our model, a Z2 symmetry remains unbroken after GUT symmetry breaking, and the lightest mass eigenstate among linear combinations of the 10-plet and the singlet fermions serves as a Higgs-portal dark matter (DM). We identify the parameter regions to reproduce the observed DM relic density while satisfying the current constraint from the direct DM detection experiments. Here, the present allowed region will be fully covered by the future direct detection experiments such as LUX-ZEPLIN DM experiment. In the presence of the extra fermions, the SM Higgs potential is stabilized up to MI.},
doi = {10.1140/epjc/s10052-019-7550-5},
journal = {European Physical Journal. C, Particles and Fields},
issn = {1434-6044},
number = 12,
volume = 79,
place = {Germany},
year = {2019},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1140/epjc/s10052-019-7550-5

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