arXiv 1503.088672015-03-30hep-phastro-ph.COgr-qchep-th

无标度暴胀模型的唯象性

Phenomenological Aspects of No-Scale Inflation Models

John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive

备注：: 41 pages, 6 figures
DOI：: 10.1088/1475-7516/2015/10/003

摘要：

我们讨论了由紧致弦模型激发的无尺度超重力暴胀模型的唯象方面，其中暴胀子可以被识别为Kähler模或无扭曲的物质场，重点是对标量谱指数$n_s$和张量-标量比$r$进行预测的模型，这些模型与Starobinsky模型相似。我们讨论了软超对称性破缺的可能模式，展示了纯无标度型$m_0 = B_0 = A_0 = 0$，通用$A_0$和$m_0 \ne 0$在高尺度的CMSSM型，和mSUGRA型$A_0 = B_0 + m_0$边界条件在高输入尺度的例子。这些可以与产生高吉诺质量$m_{1/2} \ne 0$的非平凡规范动力学函数相结合，或者可以有一个纯重力调解方案，其中三线性项和高吉诺质量通过异常产生。我们还讨论了暴胀子的衰变和再加热，显示可能的衰变通道的暴胀子时，它是一个无扭曲的物质场或凯勒模量。再加热是非常有效的，如果一个物质场暴胀子直接耦合到MSSM领域，和两个候选人导致足够的再加热的存在下，一个非平凡的规范动力学函数。

英文摘要：

We discuss phenomenological aspects of no-scale supergravity inflationary models motivated by compactified string models, in which the inflaton may be identified either as a Kähler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index $n_s$ and the tensor-to-scalar ratio $r$ that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure no-scale type $m_0 = B_0 = A_0 = 0$, of the CMSSM type with universal $A_0$ and $m_0 \ne 0$ at a high scale, and of the mSUGRA type with $A_0 = B_0 + m_0$ boundary conditions at the high input scale. These may be combined with a non-trivial gauge kinetic function that generates gaugino masses $m_{1/2} \ne 0$, or one may have a pure gravity mediation scenario where trilinear terms and gaugino masses are generated through anomalies. We also discuss inflaton decays and reheating, showing possible decay channels for the inflaton when it is either an untwisted matter field or a Kähler modulus. Reheating is very efficient if a matter field inflaton is directly coupled to MSSM fields, and both candidates lead to sufficient reheating in the presence of a non-trivial gauge kinetic function.

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