Grand Unification and Subcritical Hybrid Inflation
Grand Unification and Subcritical Hybrid Inflation
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大统一与亚临界混合暴胀
DOI：
10.1103/physrevd.91.081302
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发表时间：
2014
影响因子：
5
通讯作者：
Koji Ishiwata
中科院分区：
文献类型：
--
作者：
W. Buchmuller;Koji Ishiwata
我们考虑混合暴胀对物质的小耦合，使得暴胀场的临界值超过普朗克质量。最近的研究表明，在次临界的暴胀场值下，量子涨落会产生有效的暴胀质量。有效膨胀势在小场值处的二次势和大场值处的平台之间插入。对允许参数空间的分析导致标量谱指数n_s和张量-标量比r的预测类似于自然暴胀。利用普朗克数据偏爱的n_s和r的范围，我们发现平台的能量尺度被限制在(1.6 - 2.4)* 10^16 GeV区间，其中包括超对称标准模型中规范耦合统一的能量尺度。在通货膨胀结束前的60 e倍中，张量与标量的比率预计将有下限r bb0 0.049。
We consider hybrid inflation for small couplings of the inflaton to matter such that the critical value of the inflaton field exceeds the Planck mass. It has recently been shown that inflation then continues at subcritical inflaton field values where quantum fluctuations generate an effective inflaton mass. The effective inflaton potential interpolates between a quadratic potential at small field values and a plateau at large field values. An analysis of the allowed parameter space leads to predictions for the scalar spectral index n_s and the tensor-to-scalar ratio r similar to those of natural inflation. Using the range for n_s and r favoured by the Planck data, we find that the energy scale of the plateau is constrained to the interval (1.6 - 2.4) * 10^16 GeV which includes the energy scale of gauge coupling unification in the supersymmetric standard model. The tensor-to-scalar ratio is predicted to have the lower bound r > 0.049 for 60 e-folds before the end of inflation.