Dynamical tuning of the initial condition for new inflation in supergravity
Dynamical tuning of the initial condition for new inflation in supergravity
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DOI：
10.1016/s0370-2693(97)01040-x
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发表时间：
1997-07
影响因子：
4.4
通讯作者：
K. Izawa;M. Kawasaki;T. Yanagida
中科院分区：
文献类型：
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作者：
K. Izawa;M. Kawasaki;T. Yanagida
我们指出，对于超重力中的一类“新暴胀”模型，如果在“新暴胀”之前存在另一次暴胀（“预暴胀”），则所需的暴胀场初始值是动态设置的。我们以“暴胀前”的混合暴胀模型为例，研究了两种暴胀子的动力学。我们发现，我们的“新暴胀”模型提供的再加热温度 TR⋍ 10 MeV –104MeV 足够低，即使在规范介导的超对称破缺模型中也能避免引力问题。我们还构建了一个模型，其中“新暴胀”的规模是由超对称规范理论的非微扰动力学生成的。
We point out that for a class of ‘new inflation’ models in supergravity the required initial value of the inflaton field is dynamically set if there is another inflation (‘pre-inflation’) before the ‘new inflation’. We study the dynamics of both inflatons by taking a hybrid inflation model for the ‘pre-inflation’ as an example. We find out that our ‘new inflation’ model provides reheating temperatures TR⋍ 10 MeV –104MeV low enough to avoid the gravitino problem even in gauge-mediated supersymmetry-breaking models. We also construct a model where the scale for the ‘new inflation’ is generated by nonperturbative dynamics of a supersymmetric gauge theory.