D-term inflation in non-minimal supergravity
D-term inflation in non-minimal supergravity
复制标题
非最小超重力中的 D 项暴涨
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
M. Sakellariadou
中科院分区：
文献类型：
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作者：
J. Rocher;M. Sakellariadou
D-Term通胀是最有趣、用途最广的通胀模型之一。在高能物理中自然地实现D项暴涨是可能的，例如超对称大统一理论、超引力理论或弦理论。D项膨胀避免了η问题，而在其标准形式下，它总是以宇宙弦的形成而结束。考虑到最近三年的Wilkinson微波各向异性探测器关于宇宙微波背景温度各向异性的数据，我们检验了D项暴胀是否可以成功地在非最小超引力理论中实现。我们证明，对于我们选择的所有Kähler势，都存在一个参数空间，在该参数空间中，D项暴涨的预测与测量是一致的。宇宙弦对测量的温度各向异性的贡献总是占主导地位，除非微调超势耦合常数；这一结果已经在最小超重力范围内得到了D项暴涨。总之，宇宙弦及其在角功率谱中的作用不能仅仅通过考虑非平坦的Kähler几何来轻易地隐藏。
D-term inflation is one of the most interesting and versatile models of inflation. It is possible to implement naturally D-term inflation within high energy physics, as for example supersymmetry grand unified, supergravity, or string theories. D-term inflation avoids the η-problem, while in its standard form it always ends with the formation of cosmic strings. Given the recent three-year Wilkinson Microwave Anisotropy Probe data on the cosmic microwave background temperature anisotropies, we examine whether D-term inflation can be successfully implemented in non-minimal supergravity theories. We show that for all our choices of Kähler potential, there exists a parameter space for which the predictions of D-term inflation are in agreement with the measurements. The cosmic string contribution to the measured temperature anisotropies is always dominant, unless the superpotential coupling constant is fine-tuned; a result already obtained for D-term inflation within minimal supergravity. In conclusion, cosmic strings and their role in the angular power spectrum cannot be easily hidden by just considering a non-flat Kähler geometry.