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arXiv 1407.8522hep-phastro-ph.COhep-th
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用Planck 2013和BICEP2的结果验证超引力中的诱导引力暴胀

Reconciling Induced-Gravity Inflation in Supergravity With The Planck 2013 & BICEP2 Results

C. Pallis

摘要:

我们推广了arXiv:1403.5486中提出的无标度超引力之外的诱导引力暴胀的嵌入,使用两个规范单重手征超场,一个通过应用连续R和离散Zn对称唯一确定的超势,以及一个对数Kahler势,包括所有允许的项,直到各个场的四阶幂。我们发现,稍微增加前因子(-3)中遇到的采用Kahler势,有效的增强所得到的张量标量比可以实现渲染的预测模型与最近的BICEP 2的结果一致,即使与subplanckian漂移的原始暴胀子场。其余的暴胀观测值可以成为兼容的数据,通过温和地调整系数涉及的四阶项的Kahler潜在的混合与伴随的非暴胀场的暴胀子。暴胀子的质量预计接近10^14 GeV。

英文摘要:

We generalize the embedding of induced-gravity inflation beyond the no-scale Supergravity presented in arXiv:1403.5486 employing two gauge singlet chiral superfields, a superpotential uniquely determined by applying a continuous R and a discrete Zn symmetries, and a logarithmic Kahler potential including all the allowed terms up to fourth order in powers of the various fields. We show that, increasing slightly the prefactor (-3) encountered in the adopted Kahler potential, an efficient enhancement of the resulting tensor-to-scalar ratio can be achieved rendering the predictions of the model consistent with the recent BICEP2 results, even with subplanckian excursions of the original inflaton field. The remaining inflationary observables can become compatible with the data by mildly tuning the coefficient involved in the fourth order term of the Kahler potential which mixes the inflaton with the accompanying non-inflaton field. The inflaton mass is predicted to be close to 10^14 GeV.

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