Realistic hybrid inflation in five-dimensional orbifold SO(10) grand unified theory

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/09/024· OSTI ID:22156754

Fukuyama, Takeshi; Osaka, Toshiyuki ^[1]; Okada, Nobuchika ^[2]

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1. Department of Physics, Ritsumeikan University, Kusatsu, Shiga 525-8577 (Japan)
2. Department of Physics, University of Maryland, College Park, MD 20742 (United States)

We discuss the smooth hybrid inflation scenario in the context of a simple supersymmetric SO(10) grand unified theory (GUT) in a 5D orbifold. In this GUT model, the SO(10) gauge symmetry is broken down to the Pati-Salam (PS) gauge group, SU(4){sub c} Multiplication-Sign SU(2){sub L} Multiplication-Sign SU(2){sub R}, by means of orbifold boundary conditions, and all matter and Higgs multiplets are placed only on the brane (PS brane) where only the PS symmetry is manifest. Further breaking of the Pati-Salam group to the standard model one is realized by means of vacuum expectation values of the Higgs multiplets (4,1,2) Circled-Plus ( 4-bar ,1,2). The gauge coupling unification is successfully realized at M{sub GUT} = 4.6 Multiplication-Sign 10{sup 17} GeV after incorporating the threshold corrections of the Kaluza-Klein modes, with the compactification scale (assumed to be the same as the PS symmetry breaking scale) M{sub c} = v{sub PS} = 1.2 Multiplication-Sign 10{sup 16} GeV. We show that this orbifold GUT model can naturally lead us to smooth hybrid inflation, which turns out to be consistent with the Wilkinson Microwave Anisotropy Probe five-year data, with the M{sub GUT} and v{sub PS} predicted within the model.

• OSTI ID: 22156754
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 09 Vol. 2008; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BOUNDARY CONDITIONS
EXPECTATION VALUE
GAUGE INVARIANCE
GEV RANGE
GRAND UNIFIED THEORY
HIGGS BOSONS
INFLATIONARY UNIVERSE
KALUZA-KLEIN THEORY
MICROWAVE RADIATION
MULTIPLETS
PROBES
SO-10 GROUPS
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING