Joy, Minu ; Souradeep, Tarun (2011) Perturbed power-law parameters from WMAP7 Journal of Cosmology and Astroparticle Physics, 2011 (02). No pp. given. ISSN 1475-7516
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Official URL: http://iopscience.iop.org/article/10.1088/1475-751...
Related URL: http://dx.doi.org/10.1088/1475-7516/2011/02/016
Abstract
We present a perturbative approach for studying inflation models with soft departures from scale free spectra of the power law model. In the perturbed power law (PPL) approach one obtains at the leading order both the scalar and tensor power spectra with the running of their spectral indices. In contrast to the widely used slow roll expansion method, for which Ε and δ have to be small, PPL can look also at models with comparatively larger Ε and δ with the condition that (Ε +δ) is small. The PPL spectrum is confronted data and we show that the PPL parameters are well estimated from WMAP-7 data.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 107636 |
| Deposited On: | 26 Dec 2017 07:07 |
| Last Modified: | 26 Dec 2017 07:07 |
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