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arXiv 1702.02173hep-phastro-ph.COhep-th
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D项通货膨胀的统一模型

Unified Model of D-Term Inflation

Valerie Domcke, Kai Schmitz

摘要:

Fayet-Iliopoulos(FI)D项驱动的混合通货膨胀是一个有趣的通货膨胀模型。然而,在其通常的提法中,它有几个缺点。这些问题涉及到FI质量尺度的起源、暴胀过程中标量场的稳定性、超引力中的引力修正以及来自宇宙微波背景的最新约束。我们证明,这些问题可以得到补救,如果D项通货膨胀的背景下实现强耦合超对称规范理论。我们假设D项是动力学超对称破缺的结果。此外,我们假设正则动力学项在约旦框架以及沿暴胀方向的近似移位对称性。这为我们提供了D项暴胀和高尺度超对称破缺的统一图景。D项可能与一个规范的U(1)_B-L相关联,因此暴胀的结束在可见扇区自发地打破B-L。

英文摘要:

Hybrid inflation, driven by a Fayet-Iliopoulos (FI) D term, is an intriguing inflationary model. In its usual formulation, it however suffers from several shortcomings. These pertain to the origin of the FI mass scale, the stability of scalar fields during inflation, gravitational corrections in supergravity, as well as to the latest constraints from the cosmic microwave background. We demonstrate that these issues can be remedied if D-term inflation is realized in the context of strongly coupled supersymmetric gauge theories. We suppose that the D term is generated in consequence of dynamical supersymmetry breaking. Moreover, we assume canonical kinetic terms in the Jordan frame as well as an approximate shift symmetry along the inflaton direction. This provides us with a unified picture of D-term inflation and high-scale supersymmetry breaking. The D term may be associated with a gauged U(1)_B-L, so that the end of inflation spontaneously breaks B-L in the visible sector.

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