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Constraining slow-roll inflation in the presence of dynamical dark energy
Xia JQ(夏俊卿); Zhang XM(张新民); Xia, JQ; Zhang, XM
2008
发表期刊PHYSICS LETTERS B
卷号660期号:4页码:#REF!
通讯作者Xia, JQ (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
文章类型Article
摘要In this Letter we perform a global analysis of the constraints on the inflationary parameters in the presence of dynamical dark energy models from the current observations, including the three-year Wilkinson Microwave Anisotropy Probe (WMAP3) data, Boomerang-2K2, CBI, VSA, ACBAR, SDSS LRG, 2dFGRS and ESSENCE (192 sample). We use the analytic description of the inflationary power spectra in terms of the horizon-flow parameters {epsilon(i)} With the first order approximation in the slow-roll expansion, we find that the constraints on the horizon-flow parameters are epsilon(1) < 0.014 (95% C.L.) and epsilon(2) =0.034 +/- 0.024 (1 sigma) in the ACDM model. In the framework of dynamical dark energy models, the constraints become obviously weak, epsilon(1) < 0.022 (95% C.L.) and epsilon(2) = -0.006 +/- 0.039 (1 sigma), and the inflation models with a "blue" tilt, which are excluded about 2 sigma in the ACDM model, are allowed now. With the second order approximation, the constraints on the horizon-flow parameters are significantly relaxed further. If considering the non-zero epsilon(3), the large running of the scalar spectral index is found for the ACDM model, as well as the dynamical dark energy models. (C) 2008 Elsevier B.V. All rights reserved.
学科领域Physics
DOI10.1016/j.physletb.2008.01.010
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000253883700003
引用统计
被引频次:4[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/311005/227429
专题理论物理室
粒子天体物理中心
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Xia JQ,Zhang XM,Xia, JQ,et al. Constraining slow-roll inflation in the presence of dynamical dark energy[J]. PHYSICS LETTERS B,2008,660(4):#REF!.
APA 夏俊卿,张新民,Xia, JQ,&Zhang, XM.(2008).Constraining slow-roll inflation in the presence of dynamical dark energy.PHYSICS LETTERS B,660(4),#REF!.
MLA 夏俊卿,et al."Constraining slow-roll inflation in the presence of dynamical dark energy".PHYSICS LETTERS B 660.4(2008):#REF!.
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