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Hybrid natural low scale inflation

机译:混合自然小规模通胀

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We discuss the phenomenological implications of Hybrid Natural Inflation models in which the inflaton is a pseudo-Goldstone boson but inflation is terminated by a second scalar field. A feature of the scheme is that the scale of breaking of the Goldstone symmetry can be lower than the Planck scale and so gravitational corrections are under control. We show that, for supersymmetric models, the scale of inflation can be chosen anywhere between the Lyth upper bound and a value close to the electroweak breaking scale. The observed density perturbations and spectral index are readily obtained by the choice of the free parameters. The tensor to scalar ratio and the spectral tilt are extremely small.
机译:我们讨论了混合自然通胀模型的现象学含义,其中,膨胀气是伪金斯登玻色子,但通胀由第二标量场终止。该方案的一个特点是,戈德斯通对称性的破坏尺度可能小于普朗克尺度,因此重力校正处于可控范围内。我们表明,对于超对称模型,可以在Lyth上限和接近电弱断裂标度的值之间的任意位置选择膨胀标度。通过选择自由参数,可以轻松获得观测到的密度扰动和光谱指数。张量与标量之比和频谱倾斜非常小。

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