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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
Source PublicationPHYSICS LETTERS B
Corresponding AuthorXia, JQ (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
AbstractIn 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.
Subject AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000253883700003
ADS Bibcode2008PhLB..660..287X
ADS URLhttps://ui.adsabs.harvard.edu/abs/2008PhLB..660..287X
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2008PhLB..660..287X/citations
Citation statistics
Cited Times:4 [INSPIRE]
Cited Times:4 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
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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