Dilaton and moduli fields in D-term inflation
Dilaton and moduli fields in D-term inflation
复制标题
D 项膨胀中的膨胀和模场
DOI：
10.1103/physrevd.69.023510
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发表时间：
2003
影响因子：
5
通讯作者：
O. Seto
中科院分区：
文献类型：
--
作者：
Tatsuo C. Kobayashi;O. Seto
我们在i型弦激励模型的框架内研究了d项暴胀的可能性。尽管d项暴胀模型具有不存在所谓的$\ensuremath{\eta}$问题的优良性质，但当我们将d项暴胀嵌入弦理论时，出现了两个严重的问题：FI项的大小和膨胀的滚动运动。在本文中，我们分析了i型激励模型中d项暴胀的潜力，并研究了膨胀场和扭曲模场的行为。利用高吉诺凝聚引起的非微扰超势，可以稳定扭曲模。如果膨胀在一定范围内，它演变得非常缓慢，不会跑到无穷大。因此，d项主导的真空能可以用来驱动暴胀。通过研究膨胀模型产生的密度扰动，我们推导了模型参数的约束条件，并给出了i型模型中d项膨胀的一些启示。
We investigate the possibility of D-term inflation within the framework of type-I string-inspired models. Although the D-term inflation model has the excellent property that it is free of the so-called $\ensuremath{\eta}$ problem, two serious problems appear when we embed D-term inflation in string theory: the magnitude of the FI term and the rolling motion of the dilaton. In the present paper, we analyze the potential of D-term inflation in type-I-inspired models and study the behavior of dilaton and twisted moduli fields. Adopting the nonperturbative superpotential induced by gaugino condensation, the twisted moduli can be stabilized. If the dilaton is in a certain range, it evolves very slowly and does not run away to infinity. Thus D-term-dominated vacuum energy becomes available for driving inflation. By studying the density perturbation generated by the inflation model, we derive the constraints on model parameters and give some implications on D-term inflation in type-I-inspired models.
影响因子：
8.7
作者：
Bennett, CL;Halpern, M;Weiland, JL
通讯作者：
Weiland, JL