Smooth hybrid inflation in a supersymmetric axion model
Smooth hybrid inflation in a supersymmetric axion model
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DOI：
10.1103/physrevd.87.035010
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发表时间：
2012-11
影响因子：
5
通讯作者：
M. Kawasaki;N. Kitajima;K. Nakayama
中科院分区：
文献类型：
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作者：
M. Kawasaki;N. Kitajima;K. Nakayama
我们表明，在超对称轴子模型的框架中自然地实现了平滑的混合信息。将 Peccei-Quinn 标量场识别为 infaton 扇区的一部分，成功地产生了 WMAP 观测到的曲率扰动的幅度和谱指数。我们的模型预测了相对较大的轴子等曲率扰动及其非高斯性。撒克逊相干振荡具有很大的振幅并在宇宙中占主导地位。随后萨克森的衰变会产生大量的熵，从而稀释了不需要的遗迹。 Winos 是这种情况下最轻的超对称粒子，是在衰变过程中非热产生的，并解释了暗物质。
We show that the smooth hybrid ination is naturally realized in a framework of supersymmetric axion model. Identifying the Peccei-Quinn scalar elds as a part of the infaton sector, successful ination takes place reproducing the amplitude and spectral index of the curvature perturbation observed by WMAP. A relatively large axion isocurvature perturbation and its non-Gaussianity are predicted in our model. The saxion coherent oscillation has a large amplitude and dominates the Universe. The subsequent decay of the saxion produces huge amount of entropy, which dilutes unwanted relics. Winos, the lightest supersymmetric particles in this scenario, are produced non-thermally in the decay and account for dark matter.