Saving Natural Inflation
Saving Natural Inflation
复制标题
拯救自然通货膨胀
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
V. Sanz
中科院分区：
文献类型：
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作者：
Djuna Croon;V. Sanz
慢卷暴胀要求暴胀子场具有异常平坦的势，这与暴胀尺度的测量相结合，需要某种程度的微调。另一种可能是，势的平坦性可能是由于暴胀子的起源是一个伪戈德斯通玻色子，就像自然暴胀中的那样。唉，与普朗克数据的一致性使自然暴胀的原始提议陷入困境，因为它需要暴胀子的跨普朗克漂移。虽然我们仍然可以将重整化势调整到次普朗克值，但来自量子引力或戈德斯通对称性破缺的高阶修正会破坏模型的预测性。在本文中，我们展示了如何在更现实的自然暴胀模型中，人们可以实现暴胀而不需要场的trans-Planckian偏移。我们展示了如何一个变体的超自然膨胀与散装费米子可以实现预期的目标，并讨论其四维的量子。我们还提出了一种新型的四维模型的启发小希格斯和复合希格斯模型，可以导致次普朗克值的暴胀子场。
Slow-roll inflation requires the inflaton field to have an exceptionally flat potential, which combined with measurements of the scale of inflation demands some degree of fine-tuning. Alternatively, the flatness of the potential could be due to the inflaton's origin as a pseudo-Goldstone boson, as in Natural Inflation. Alas, consistency with Planck data places the original proposal of Natural Inflation in a tight spot, as it requires a trans-Planckian excursion of the inflaton. Although one can still tune the renormalizable potential to sub-Planckian values, higher order corrections from quantum gravity or sources of breaking of the Goldstone symmetry would ruin the predictivity of the model. In this paper we show how in more realistic models of Natural Inflation one could achieve inflation without a trans-Planckian excursion of the field. We show how a variant of Extra-natural inflation with bulk fermions can achieve the desired goal and discuss its four-dimensional duals. We also present a new type of four dimensional models inspired in Little Higgs and Composite Higgs models which can lead to sub-Planckian values of the inflaton field.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.