Low-scale inflation and supersymmetry breaking in racetrack models

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.083538· OSTI ID:21409590

Allahverdi, Rouzbeh ^[1]; Dutta, Bhaskar; Sinha, Kuver ^[2]

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1. Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States)
2. Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843-4242 (United States)

In many moduli stabilization schemes in string theory, the scale of inflation appears to be of the same order as the scale of supersymmetry breaking. For low-scale supersymmetry breaking, therefore, the scale of inflation should also be low, unless this correlation is avoided in specific models. We explore such a low-scale inflationary scenario in a racetrack model with a single modulus in type IIB string theory. Inflation occurs near a point of inflection in the Kaehler modulus potential. Obtaining acceptable cosmological density perturbations leads to the introduction of magnetized D7-branes sourcing nonperturbative superpotentials. The gravitino mass, m{sub 3/2}, is chosen to be around 30 TeV, so that gravitinos that are produced in the inflaton decay do not affect big-bang nucleosynthesis. Supersymmetry is communicated to the visible sector by a mixture of anomaly and modulus mediation. We find that the two sources contribute equally to the gaugino masses, while scalar masses are decided mainly by anomaly contribution. This happens as a result of the low scale of inflation and can be probed at the LHC.

• OSTI ID: 21409590
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
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COMPOSITE MODELS
CORRELATIONS
CYCLIC ACCELERATORS
D-BRANES
DECAY
DENSITY
DISTURBANCES
ELEMENTARY PARTICLES
ENERGY RANGE
EXTENDED PARTICLE MODEL
GRAVITATIONAL RADIATION
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MATHEMATICAL MODELS
NUCLEOSYNTHESIS
PARTICLE DECAY
PARTICLE MODELS
PERTURBATION THEORY
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUARK MODEL
RADIATIONS
STABILIZATION
STORAGE RINGS
STRING MODELS
STRING THEORY
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYNCHROTRONS
SYNTHESIS
TEV RANGE
TEV RANGE 10-100