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arXiv 0704.3043astro-phgr-qchep-th
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单场暴胀模型的CMB和LSS约束

CMB and LSS constraints on a single-field model of inflation

F. C. Carvalho, J. S. Alcaniz, J. A. S. Lima, R. Silva

摘要:

利用Wilkinson-Microwave Anisotropy Probe和Sloan Digital Sky Survey的三年观测资料,提出了一种新的暴胀情景,其指数势$V(Φ)$除了标准线性项外,还与场$Φ$具有二次依赖关系。e折叠数($N$)、张量与标量扰动之比($r$)、原始功率谱的谱标量指数($n_s$)及其运行($dn_s/d\ln k$)取决于无量纲参数$α$乘以势中的二次项。在极限$α\to 0$下,标准指数势的所有结果都完全恢复。对于$α\neq 0$的值,我们发现,模型的预测是在很好的协议与目前的观测宇宙微波背景(CMB)的各向异性和大尺度结构(LSS)在宇宙中。

英文摘要:

A new inflationary scenario whose exponential potential $V(Φ)$ has a quadratic dependence on the field $Φ$ in addition to the standard linear term is confronted with the tree-year observations of the Wilkinson-Microwave Anisotropy Probe and the Sloan Digital Sky Survey data. The number of e-folds ($N$), the ratio of tensor-to-scalar perturbations ($r$), the spectral scalar index of the primordial power spectrum ($n_s$) and its running ($dn_s/d\ln k$) depend on the dimensionless parameter $α$ multiplying the quadratic term in the potential. In the limit $α\to 0$ all the results of the standard exponential potential are fully recovered. For values of $α\neq 0$, we find that the model predictions are in good agreement with the current observations of the Cosmic Microwave Background (CMB) anisotropies and Large-Scale Structure (LSS) in the Universe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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