Inflation in supersymmetric SU(5)

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.063522· OSTI ID:21537515

Khalil, S ^[1]; Rehman, M U; Shafi, Q ^[2]; Zaakouk, E A ^[1]

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1. Ain Shams University, Faculty of Science, Cairo, 11566 (Egypt)
2. Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States)

We analyze the adjoint field inflation in supersymmetric (SUSY) SU(5) model. In minimal SUSY SU(5) hybrid inflation monopoles are produced at the end of inflation. We therefore explore the nonminimal model of inflation based on SUSY SU(5), like shifted hybrid inflation, which provides a natural solution for the monopole problem. We find that the supergravity corrections with nonminimal Kaehler potential are crucial to realize the central value of the scalar spectral index n{sub s{approx_equal}}0.96 consistent with the 7 yr WMAP data. The tensor to scalar ratio r is quite small, taking on values r < or approx. 10{sup -5}. Because of R symmetry massless SU(3) octet and SU(2) triplet supermultiplets are present and could spoil gauge coupling unification. To keep gauge coupling unification intact, light vectorlike particles are added which are expected to be observed at LHC.

• OSTI ID: 21537515
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
CERN LHC
CORRECTIONS
COUPLING
CYCLIC ACCELERATORS
ELECTROMAGNETIC RADIATION
FIELD THEORIES
GAUGE INVARIANCE
INVARIANCE PRINCIPLES
LIE GROUPS
MONOPOLES
MULTIPLETS
PARTICLES
RADIATIONS
SIMULATION
STORAGE RINGS
SU GROUPS
SU-5 GROUPS
SUPERGRAVITY
SUPERMULTIPLETS
SUPERSYMMETRY
SYMMETRY
SYMMETRY GROUPS
SYNCHROTRONS
TRIPLETS
UNIFIED-FIELD THEORIES
VISIBLE RADIATION