The Starobinsky model from superconformal D-term inflation
The Starobinsky model from superconformal D-term inflation
复制标题
超共形 D 项膨胀的 Starobinsky 模型
DOI：
10.1016/j.physletb.2013.08.042
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发表时间：
2013
影响因子：
4.4
通讯作者：
K. Kamada
中科院分区：
文献类型：
--
作者：
W. Buchmuller;V. Domcke;K. Kamada
我们指出，在大场域中，最近提出的超共形d项暴胀模型与Starobinsky模型是一致的。在Jordan框架的引力动力学项中，膨胀场支配着普朗克质量。对于足够大规格的联轴器，可以在大范围内实现慢滚膨胀。如果存在Jordan框架，那么Starobinsky模型通常作为慢滚暴胀的有效描述出现，其中对于大暴胀场值，作用是尺度不变的，并且暴胀自耦合和非最小耦合与重力的比值λ}很小。在不同的模型中，对这种有效耦合的解释是不同的。在超共形d项暴胀中，它由大统一尺度λ ~ （Λ GUT/M P） 4决定。
We point out that in the large field regime, the recently proposed superconformal D-term inflation model coincides with the Starobinsky model. In this regime, the inflaton field dominates over the Planck mass in the gravitational kinetic term in the Jordan frame. Slow-roll inflation is realized in the large field regime for sufficiently large gauge couplings. The Starobinsky model generally emerges as an effective description of slow-roll inflation if a Jordan frame exists where, for large inflaton field values, the action is scale invariant and the ratio λ ˆ of the inflaton self-coupling and the nonminimal coupling to gravity is tiny. The interpretation of this effective coupling is different in different models. In superconformal D-term inflation it is determined by the scale of grand unification, λ ˆ∼(Λ GUT/M P) 4.