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arXiv 1607.01680hep-thastro-ph.CO
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具有稳定场的D-膜大场暴胀的挑战

Challenges for D-brane large-field inflation with stabilizer fields

Aitor Landete, Fernando Marchesano, Clemens Wieck

摘要:

我们研究可能的弦论紧化,在低能量极限,描述混沌膨胀与稳定场。我们首先分析IIA型的设置,其中暴胀的潜力产生于一个D 6膜包裹一个内部的三个周期,和稳定场是一个开弦或散装凯勒模量。我们发现,在整合出相关的闭弦模量一致,快子的方向出现在通货膨胀,不能解除。这最终是由于IIA型Kähler势在大紧化体积下的移位对称性。这促使我们在IIB型orientifolds的复杂结构扇区中寻找稳定剂候选者,因为这些字段耦合到D 7-膜威尔逊线,并且它们的移位对称性一般脱离大的复杂结构极限。然而,我们发现,在这些设置的挑战是获得必要的层次之间的通货膨胀和卡鲁扎-克莱因规模。

英文摘要:

We study possible string theory compactifications which, in the low-energy limit, describe chaotic inflation with a stabilizer field. We first analyze type IIA setups where the inflationary potential arises from a D6-brane wrapping an internal three-cycle, and where the stabilizer field is either an open-string or bulk Kähler modulus. We find that after integrating out the relevant closed-string moduli consistently, tachyonic directions arise during inflation which cannot be lifted. This is ultimately due to the shift symmetries of the type IIA Kähler potential at large compactification volume. This motivates us to search for stabilizer candidates in the complex structure sector of type IIB orientifolds, since these fields couple to D7-brane Wilson lines and their shift symmetries are generically broken away from the large complex structure limit. However, we find that in these setups the challenge is to obtain the necessary hierarchy between the inflationary and Kaluza-Klein scales.

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