Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck
We constrain models of single field inflation with the pre-Planck CMB data. The data used here is the 9-year Wilkinson Microwave Anisotropy Probe (WMAP) data, South Pole Telescope (SPT) data and Atacama Cosmology Telescope (ACT) data. By adding in running of spectral index parameter, we find that th...
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ftchinacadscitp:oai:ir.itp.ac.cn/:311006/15329 2023-05-15T18:22:57+02:00 Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck Cheng, C Huang, QG Ma, YZ Cheng, C (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. 2013 http://ir.itp.ac.cn/handle/311006/15329 https://doi.org/10.1088/1475-7516/2013/07/018 英语 eng JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Cheng, C; Huang, QG; Ma, YZ.Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck,JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013,(7):18 http://ir.itp.ac.cn/handle/311006/15329 http://dx.doi.org/10.1088/1475-7516/2013/07/018 Baryon Acoustic-oscillations Quantum Corrections Hubble Constant Flatness Universe Horizon Physics 期刊论文 2013 ftchinacadscitp https://doi.org/10.1088/1475-7516/2013/07/018 2020-07-24T14:08:39Z We constrain models of single field inflation with the pre-Planck CMB data. The data used here is the 9-year Wilkinson Microwave Anisotropy Probe (WMAP) data, South Pole Telescope (SPT) data and Atacama Cosmology Telescope (ACT) data. By adding in running of spectral index parameter, we find that the chi(2) is improved by a factor of Delta chi(2) = 8.44, which strongly indicates the preference of this parameter from current data. In addition, we find that the running of spectral index as does not change very much even if we switch to different pivot scales, which suggests that the power law expansion of power spectrum is accurate enough till the 1st order term. Furthermore, we find that the joint constraints on r - n(s) give very tight constraints on single-field inflation models, and the models with power law potential empty set(p) can only survive if 0.9 less than or similar to p less than or similar to 2.1, so a large class of inflation models have already been ruled out before Planck data. Finally, we use the f(NL) data to constrain the non-trivial sound speed c(s). We find that the current constraint is dominated by the power spectrum constraints which have some inconsistency with the constraints from f(NL). This poses important questions of consistency between power spectrum and bispectrum of WMAP data. Report South pole Institute of Theoretical Physics: ITP OpenIR (Chinese Academy of Sciences) South Pole Wilkinson ENVELOPE(-66.200,-66.200,-66.817,-66.817) Pivot ENVELOPE(-30.239,-30.239,-80.667,-80.667) Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) Journal of Cosmology and Astroparticle Physics 2013 07 018 018 |
institution |
Open Polar |
collection |
Institute of Theoretical Physics: ITP OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscitp |
language |
English |
topic |
Baryon Acoustic-oscillations Quantum Corrections Hubble Constant Flatness Universe Horizon Physics |
spellingShingle |
Baryon Acoustic-oscillations Quantum Corrections Hubble Constant Flatness Universe Horizon Physics Cheng, C Huang, QG Ma, YZ Cheng, C (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
topic_facet |
Baryon Acoustic-oscillations Quantum Corrections Hubble Constant Flatness Universe Horizon Physics |
description |
We constrain models of single field inflation with the pre-Planck CMB data. The data used here is the 9-year Wilkinson Microwave Anisotropy Probe (WMAP) data, South Pole Telescope (SPT) data and Atacama Cosmology Telescope (ACT) data. By adding in running of spectral index parameter, we find that the chi(2) is improved by a factor of Delta chi(2) = 8.44, which strongly indicates the preference of this parameter from current data. In addition, we find that the running of spectral index as does not change very much even if we switch to different pivot scales, which suggests that the power law expansion of power spectrum is accurate enough till the 1st order term. Furthermore, we find that the joint constraints on r - n(s) give very tight constraints on single-field inflation models, and the models with power law potential empty set(p) can only survive if 0.9 less than or similar to p less than or similar to 2.1, so a large class of inflation models have already been ruled out before Planck data. Finally, we use the f(NL) data to constrain the non-trivial sound speed c(s). We find that the current constraint is dominated by the power spectrum constraints which have some inconsistency with the constraints from f(NL). This poses important questions of consistency between power spectrum and bispectrum of WMAP data. |
format |
Report |
author |
Cheng, C Huang, QG Ma, YZ Cheng, C (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. |
author_facet |
Cheng, C Huang, QG Ma, YZ Cheng, C (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. |
author_sort |
Cheng, C |
title |
Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
title_short |
Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
title_full |
Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
title_fullStr |
Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
title_full_unstemmed |
Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck |
title_sort |
constraints on single-field inflation with wmap, spt and act data - a last-minute stand before planck |
publishDate |
2013 |
url |
http://ir.itp.ac.cn/handle/311006/15329 https://doi.org/10.1088/1475-7516/2013/07/018 |
long_lat |
ENVELOPE(-66.200,-66.200,-66.817,-66.817) ENVELOPE(-30.239,-30.239,-80.667,-80.667) ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
South Pole Wilkinson Pivot Hubble |
geographic_facet |
South Pole Wilkinson Pivot Hubble |
genre |
South pole |
genre_facet |
South pole |
op_relation |
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Cheng, C; Huang, QG; Ma, YZ.Constraints on single-field inflation with WMAP, SPT and ACT data - a last-minute stand before Planck,JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2013,(7):18 http://ir.itp.ac.cn/handle/311006/15329 http://dx.doi.org/10.1088/1475-7516/2013/07/018 |
op_doi |
https://doi.org/10.1088/1475-7516/2013/07/018 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2013 |
container_issue |
07 |
container_start_page |
018 |
op_container_end_page |
018 |
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1766202360264130560 |