Hiding cosmic strings in supergravity D-term inflation

Journal Article · Sun Jan 15 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.73.0· OSTI ID:20795700

Seto, Osamu ^[1]; Yokoyama, Jun'ichi ^[2]

---

1. Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QJ (United Kingdom)
2. Research Center for the Early Universe, Graduate School of Science, University of Tokyo, Tokyo 113-0033 (Japan)

The influence of higher-order terms in the Kaehler potential of the supergravity D-term inflation model on the density perturbation is studied. We show that these terms can make the inflaton potential flatter, which lowers the energy scale of inflation under the COBE/WMAP normalization. As a result, the mass per unit length of cosmic strings, which are produced at the end of inflation, can be reduced to a harmless but detectable level without introducing a tiny Yukawa coupling. Our scenario can naturally be implemented in models with a low cutoff as in Type I or Type IIB orientifold models.

• OSTI ID: 20795700
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevD.73.023508; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
DENSITY
DISTURBANCES
INFLATIONARY UNIVERSE
MASS
STRING MODELS
SUPERGRAVITY
YUKAWA POTENTIAL