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Single field inflation with modulated potential in light of Planck and BICEP2
Wan YP(万友平); Li SY(李思宇); Wan, YP; Li, SY; Li, MZ; Qiu, TT; Cai, YF; Zhang, XM;张新民
2014
发表期刊PHYSICAL REVIEW D
卷号90期号:2页码:23537
摘要The recently released BICEP2 data detected the primordial B-mode polarization in the cosmic microwave background (CMB) map which strongly supports for a large tensor-to-scalar ratio, and, thus, is found to be in tension with the Planck experiment with no evidence of primordial gravitational waves. Such an observational tension, if confirmed by forthcoming measurements, would bring a theoretical challenge for the very early Universe models. To address this issue, we revisit a single field inflation model proposed by Wang et al. [Int. J. Mod. Phys. D 14, 1347 (2005)] and Feng et al. [Phys. Rev. D 68, 103511 (2003)] which includes a modulated potential. We show that this inflation model can give rise to a sizable negative running behavior for the spectral index of primordial curvature perturbation and a large tensor-to-scalar ratio. Applying these properties, our model can nicely explain the combined Planck and BICEP2 observations. To examine the validity of analytic calculations, we numerically confront the predicted temperature and B-mode power spectra with the latest CMB observations and explicitly show that our model is consistent with the current data.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.90.023537
收录类别SCI
WOS记录号WOS:000339618400005
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225280
专题理论物理室
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Wan YP,Li SY,Wan, YP,et al. Single field inflation with modulated potential in light of Planck and BICEP2[J]. PHYSICAL REVIEW D,2014,90(2):23537.
APA 万友平.,李思宇.,Wan, YP.,Li, SY.,Li, MZ.,...&Zhang, XM;张新民.(2014).Single field inflation with modulated potential in light of Planck and BICEP2.PHYSICAL REVIEW D,90(2),23537.
MLA 万友平,et al."Single field inflation with modulated potential in light of Planck and BICEP2".PHYSICAL REVIEW D 90.2(2014):23537.
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