Self-unitarization of New Higgs Inflation and compatibility with Planck and BICEP2 data
Self-unitarization of New Higgs Inflation and compatibility with Planck and BICEP2 data
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DOI：
10.1088/1475-7516/2014/12/009
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发表时间：
2014-03
影响因子：
6.4
通讯作者：
C. Germani;Yuki Watanabe;N. Wintergerst
中科院分区：
文献类型：
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作者：
C. Germani;Yuki Watanabe;N. Wintergerst
在这篇文章中，我们证明了希格斯暴涨(或新希格斯暴涨)的Germani-Kehagias模型与最新的Planck和BICEP2数据是完美兼容的。此外，我们还证明了在新希格斯暴涨情形下，通过负运行谱指数，Planck和BICEP2数据之间的紧张关系可以得到缓解。关于模型的统一性，我们认为它在整个宇宙的演化过程中是统一性的。Higgs-Higgs和Higgs-Graviton扇区的弱耦合是由膨胀期间依赖于背景的大的截止尺度提供的。在同一区域，W规范玻色子和Z规范玻色子获得了非常大的质量，因此解耦。另一方面，如果它们也与希格斯玻色子非最小耦合，它们的有效质量可以极大地减少。在这种情况下，W玻色子和Z玻色子不再解耦。在膨胀后，新希格斯模型可以很好地用一个具有可重整化势能的四次伽利略来近似。我们认为，这可以统一地为通胀最终开始创造合适的条件。
In this paper we show that the Germani-Kehagias model of Higgs inflation (or New Higgs Inflation), where the Higgs boson is kinetically non-minimally coupled to the Einstein tensor is in perfect compatibility with the latest Planck and BICEP2 data. Moreover, we show that the tension between the Planck and BICEP2 data can be relieved within the New Higgs inflation scenario by a negative running of the spectral index. Regarding the unitarity of the model, we argue that it is unitary throughout the evolution of the Universe. Weak couplings in the Higgs-Higgs and Higgs-graviton sectors are provided by a large background dependent cut-off scale during inflation. In the same regime, the W and Z gauge bosons acquire a very large mass, thus decouple. On the other hand, if they are also non-minimally coupled to the Higgs boson, their effective masses can be enormously reduced. In this case, the W and Z bosons are no longer decoupled. After inflation, the New Higgs model is well approximated by a quartic Galileon with a renormalizable potential. We argue that this can unitarily create the right conditions for inflation to eventually start.