Constraining slow-roll inflation with WMAP and 2dF

Liddle, A.R. and Leach, S.M. (2003) Constraining slow-roll inflation with WMAP and 2dF. Physical Review D, 68 (12). p. 123508. ISSN 0556-2821

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We constrain slow-roll inflationary models using the recent Wilkinson Microwave Anisotropy Probe data combined with data from the VSA, CBI, ACBAR and 2dF experiments. We find the slow-roll parameters to be 0<ε1<0.032 and ε2+5.0ε1=0.036±0.025. For inflation models V∝φα we find that α<3.9,4.3 at the 2σ and 3σ levels, indicating that the λφ4 model is under very strong pressure from observations. We define a convergence criterion to judge the necessity of introducing further power spectrum parameters such as the spectral index and running of the spectral index. This criterion is typically violated by models with large negative running that fit the data, indicating that the running cannot be reliably measured with present data.

Item Type: Article
Keywords: slow-roll inflation; WMAP; 2dF
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Gemma Farrell
Date Deposited: 12 Mar 2008
Last Modified: 06 Mar 2017 20:19
Google Scholar:153 Citations

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