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arXiv 0803.3809hep-phastro-phgr-qchep-th
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无希格斯粒子宇宙中GUT尺度的希格斯膨胀

Higgsflation at the GUT scale in a Higgsless Universe

Nemanja Kaloper, Lorenzo Sorbo, Jun'ichi Yokoyama

摘要:

我们在诱导引力中重新讨论暴胀。我们的重点是模型中的低尺度普朗克质量是完全由破缺的标度对称性的场论部门。打破对称性的类希格斯场具有GUT尺度的真空期望值,与理论中其他光场的引力耦合引起的曲率具有非最小耦合,因此其期望值控制引力强度。这个场可以驱动暴胀,并给出一个与宇宙学观测非常一致的低能宇宙。标准模型的低能动力学不能用希格斯平坦子来统一,希格斯平坦子与低能理论不同,这既是因为它获得了大质量,也是因为它与低能模的直接耦合被削弱了。相反,标准模型的短距离行为可能受到其他光自由度的动力学的调节,例如在无希格斯模型中。

英文摘要:

We revisit inflation in induced gravity. Our focus is on models where the low scale Planck mass is completely determined by the breaking of the scaling symmetry in the field theory sector. The Higgs-like field which breaks the symmetry with a GUT-scale vacuum expectation value has non-minimal couplings to the curvature, induced by the gravitational couplings of the other light fields in the theory, so that its expectation value controls the gravitational strength. This field can drive inflation, and give a low energy universe in very good agreement with the cosmological observations. The low energy dynamics of the Standard Model cannot be unitarized by the Higgsflaton, which decouples from the low energy theory, both because it picks up a large mass and because its direct couplings to the low energy modes are weakened. Instead, the short distance behavior of the Standard Model may be regulated by the dynamics of other light degrees of freedom, such as in Higgsless models.

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