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arXiv 0812.0249hep-phastro-ph
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F-term混合通货膨胀跟随模块通货膨胀

F-Term Hybrid Inflation Followed by Modular Inflation

C. Pallis

摘要:

我们考虑了(标准)超对称F-项混合暴胀(FHI)的动机良好的模型,它可以实现接近大统一尺度。预测的标量谱指数$n_s$不可能小于0.98,如果对应于主尺度$k_*=0.002/{\rm Mpc}$的e-折叠数在50左右,则包括来自最小超重力的修正,可以超过1。这些结果与威尔金森微波各向异性探测器数据的拟合符合标准的幂律宇宙学模型与冷暗物质和宇宙学常数。然而,可以通过限制$k_*$在FHI期间遭受的e-折叠的数量来减少$n_s$。解决视界和平坦性问题所需的额外e-折叠,可以通过随后的快卷[慢卷]模膨胀阶段产生,该模膨胀阶段是由弦模实现的,弦模在模膨胀开始之前没有[没有]获得有效质量。

英文摘要:

We consider the well motivated model of the (standard) supersymmetric F-term hybrid inflation (FHI) which can be realized close to the grand unification scale. The predicted scalar spectral index $n_s$ cannot be smaller than 0.98 and can exceed unity including corrections from minimal supergravity, if the number of e-foldings corresponding to the pivot scale $k_*=0.002/{\rm Mpc}$ is around 50. These results are marginally consistent with the fitting of the Wilkinson microwave anisotropy probe data by the standard power-law cosmological model with cold dark matter and a cosmological constant. However, $n_s$ can be reduced by restricting the number of e-foldings that $k_*$ suffered during FHI. The additional e-foldings required for solving the horizon and flatness problems can be generated by a subsequent stage of fast-roll [slow-roll] modular inflation realized by a string modulus which does [does not] acquire effective mass before the onset of modular inflation.

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