Precision of inflaton potential reconstruction from CMB using the general slow-roll approximation - INSPIRE

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Precision of inflaton potential reconstruction from CMB using the general slow-roll approximation

Kenji Kadota
(
- Fermilab
)
,
Scott Dodelson
(
)
,
Wayne Hu
(
- Chicago U., Astron. Astrophys. Ctr. and
- Chicago U., KICP
)
,
Ewan D. Stewart
(
- KAIST, Taejon and
- Canadian Inst. Theor. Astrophys.
)

May, 2005

9 pages

Published in:

Phys.Rev.D 72 (2005) 023510

e-Print:

astro-ph/0505158 [astro-ph]

DOI:

10.1103/PhysRevD.72.023510

Report number:

FERMILAB-PUB-05-059-A

View in:

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Abstract: (arXiv)

Through a principal component analysis, we study how accurately CMB observables can constrain inflaton potentials in a model independent manner. We apply the general slow-roll approximation in our analysis where we allow, in contrast to the standard slow-roll approximation, the possibility of variations in

V''(\phi)

and take into account the fact that horizon crossing is not an instantaneous event. Our analysis provides a set of modes to be used in fitting observables. We find that of order five of these modes will be constrained by future observations, so a fully general data analysis package could use the amplitudes of just a handful of modes as free parameters and retain all relevant information in the data.

98.80.Cq
inflation
cosmic background radiation
inflaton: potential
parametrization
slow-roll approximation
numerical calculations

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Figures(0)

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