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High Energy Physics - Theory

arXiv:0708.4285 (hep-th)
[Submitted on 31 Aug 2007 (v1), last revised 4 Feb 2008 (this version, v2)]

Title:Constraints on Wrapped DBI Inflation in a Warped Throat

Authors:Takeshi Kobayashi, Shinji Mukohyama, Shunichiro Kinoshita
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Abstract: We derive constraints on the tensor to scalar ratio and on the background charge of the warped throat for DBI inflation driven by D5- and D7-branes wrapped over cycles of the throat. It is shown that the background charge well beyond the known maximal value is required in most cases for DBI inflation to generate cosmological observables compatible with the WMAP3 data. Most of the results derived in this paper are insensitive to the details of the inflaton potential, and could be applied to generic warped throats.
Comments: 20 pages, REVTeX4, v2: published in JCAP
Subjects: High Energy Physics - Theory (hep-th); Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)
Report number: UTAP-585, RESCEU-84/07
Cite as: arXiv:0708.4285 [hep-th]
  (or arXiv:0708.4285v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.0708.4285
Journal reference: JCAP 0801:028,2008
Related DOI: https://doi.org/10.1088/1475-7516/2008/01/028

Submission history

From: Takeshi Kobayashi [view email]
[v1] Fri, 31 Aug 2007 07:35:19 UTC (24 KB)
[v2] Mon, 4 Feb 2008 02:04:58 UTC (27 KB)
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