Brane inflation revisited after WMAP five-year results

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/03/006· OSTI ID:22156927

Ma, Yin-Zhe ^[1]; Zhang, Xin ^[2]

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1. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom)
2. College of Sciences, Northeastern University, Shenyang 110004, Liaoning (China)

In this paper, we revisit brane inflation models with the WMAP five-year results. The WMAP five-year data favor a red-tilted power spectrum of primordial fluctuations at the level of two standard deviations, which is the same as the WMAP three-year result qualitatively, but quantitatively the spectral index is slightly greater than the three-year value. This result can bring impacts on brane inflation models. According to the WMAP five-year data, we find that the KKLMMT model can survive at the level of one standard deviation, and the fine-tuning of the parameter {beta} can be alleviated to a certain extent at the level of two standard deviations.

• OSTI ID: 22156927
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 03; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRANES
DATA ACQUISITION
ERRORS
INFLATIONARY UNIVERSE
SPECTRA