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arXiv 0802.0227hep-ph
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自然充盈:WMAP 3年数据后的状态

Natural Inflation: the status after WMAP 3-year data

Katherine Freese, William H. Kinney, Christopher Savage

摘要:

自然通货膨胀的模型进行检查,在最近3年的数据从威尔金森微波各向异性探测器,并显示提供了一个很好的拟合。由于位移对称性,暴胀子势自然是平坦的,最简单的形式为$V(ϕ) = Λ^4 [1 \pm \cos(Nϕ/f)]$。只要$f > 0.7 m_{Pl}$(其中$m_{Pl} = 1.22 \times 10^{19}$ GeV)和$Λ\sim m_{GUT}$,模型就与WMAP 3测量一致。运行的标量光谱指数被证明是小的-一个数量级以下的灵敏度WMAP 3。现场的位置时,可观察到的尺度上的扰动产生的潜力进行检查; $f > 5 m_{Pl}$,相关部分的潜力是无法区分的二次,但具有的优势,所需的平坦度是动机良好。根据$f$的值,模型分为大字段($f \ge 1.5 m_{Pl}$)或小字段($f < 1.5 m_{Pl}$)分类方案,已应用于通货膨胀模型。自然膨胀提供了一个很好的适合WMAP 3数据。

英文摘要:

The model of Natural Inflation is examined in light of recent 3-year data from the Wilkinson Microwave Anisotropy Probe and shown to provide a good fit. The inflaton potential is naturally flat due to shift symmetries, and in the simplest version takes the form $V(ϕ) = Λ^4 [1 \pm \cos(Nϕ/f)]$. The model agrees with WMAP3 measurements as long as $f > 0.7 m_{Pl}$ (where $m_{Pl} = 1.22 \times 10^{19}$GeV) and $Λ\sim m_{GUT}$. The running of the scalar spectral index is shown to be small -- an order of magnitude below the sensitivity of WMAP3. The location of the field in the potential when perturbations on observable scales are produced is examined; for $f > 5 m_{Pl}$, the relevant part of the potential is indistinguishable from a quadratic, yet has the advantage that the required flatness is well-motivated. Depending on the value of $f$, the model falls into the large field ($f \ge 1.5 m_{Pl}$) or small field ($f < 1.5 m_{Pl}$) classification scheme that has been applied to inflation models. Natural inflation provides a good fit to WMAP3 data.

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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