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High Energy Physics - Theory

arXiv:hep-th/0501099 (hep-th)
[Submitted on 13 Jan 2005 (v1), last revised 21 Feb 2005 (this version, v3)]

Title:Brane Inflation and Cosmic String Tension in Superstring Theory

Authors:Hassan Firouzjahi, S.-H. Henry Tye
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Abstract: In a simple reanalysis of the KKLMMT scenario, we argue that the slow roll condition in the D3-anti-D3-brane inflationary scenario in superstring theory requires no more than a moderate tuning. The cosmic string tension is very sensitive to the conformal coupling: with less fine-tuning, the cosmic string tension (as well as the ratio of tensor to scalar perturbation mode) increases rapidly and can easily saturate the present observational bound. In a multi-throat brane inflationary scenario, this feature substantially improves the chance of detecting and measuring the properties of the cosmic strings as a window to the superstring theory and our pre-inflationary universe.
Comments: Combined bounds from WMAP and SDSS Lyman alpha experiments are added for analysis, changes are added to the table
Subjects: High Energy Physics - Theory (hep-th); Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:hep-th/0501099
  (or arXiv:hep-th/0501099v3 for this version)
  https://doi.org/10.48550/arXiv.hep-th/0501099
Journal reference: JCAP0503:009,2005
Related DOI: https://doi.org/10.1088/1475-7516/2005/03/009

Submission history

From: Hassan Firouzjahi [view email]
[v1] Thu, 13 Jan 2005 19:56:31 UTC (45 KB)
[v2] Mon, 17 Jan 2005 20:21:25 UTC (45 KB)
[v3] Mon, 21 Feb 2005 17:20:56 UTC (46 KB)
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