Constraints on wrapped Dirac–Born–Infeld inflation in a warped throat
Constraints on wrapped Dirac–Born–Infeld inflation in a warped throat
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DOI：
10.1088/1475-7516/2008/01/028
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发表时间：
2007-08
影响因子：
6.4
通讯作者：
Takeshi Kobayashi;S. Mukohyama;Shunichiro Kinoshita
中科院分区：
文献类型：
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作者：
Takeshi Kobayashi;S. Mukohyama;Shunichiro Kinoshita
我们推导了D5和D7膜包裹在喉部循环上驱动的Dirac-Born-Infeld膨胀的张量标量比和翘曲喉部背景电荷的约束条件。结果表明，在大多数情况下，要产生与WMAP3(Wilkinson微波各向异性探测器3)数据相容的宇宙学观测数据，需要远超过已知最大值的背景电荷。本文得到的大多数结果对膨胀子势的细节不敏感，并且可以应用于一般的翘曲喉道。
We derive constraints on the tensor to scalar ratio and on the background charge of the warped throat for Dirac–Born–Infeld inflation driven by D5- and D7-branes wrapped over cycles of the throat. It is shown that background charge well beyond the known maximal value is required in most cases for Dirac–Born–Infeld inflation to generate cosmological observables compatible with the WMAP3 (Wilkinson Microwave Anisotropy Probe 3) 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.