On the Tensor/Scalar Ratio in Inflation with UV Cutoff

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dc.creatorAshoorioon, A.
dc.creatorMann, R. B.
dc.date2004-11-10
dc.date2005-05-20
dc.date.accessioned2026-07-07T03:29:09Z
dc.date.available2026-07-07T03:29:09Z
dc.descriptionAnisotropy of the cosmic microwave background radiation (CMB) originates from both tensor and scalar perturbations. To study the characteristics of each of these two kinds of perturbations, one has to determine the contribution of each to the anisotropy of CMB. For example, the ratio of the power spectra of tensor/scalar perturbations can be used to tighten bounds on the scalar spectral index. We investigate here the implications for the tensor/scalar ratio of the recent discovery (noted in astro-ph/0410139) that the introduction of a minimal length cutoff in the structure of spacetime does not leave boundary terms invariant. Such a cutoff introduces an ambiguity in the choice of action for tensor and scalar perturbations, which in turn can affect this ratio. We numerically solve for both tensor and scalar mode equations in a near-de-sitter background and explicitly find the cutoff dependence of the tensor/scalar ratio during inflation.
dc.description19 pages, 14 figures, to appear in Nucl. Phys. B; v4: typos corrected, matched with the published version
dc.identifierhttps://arxiv.org/abs/gr-qc/0411056
dc.identifierhttp://arxiv.org/abs/gr-qc/0411056
dc.identifierNucl.Phys. B716 (2005) 261-279
dc.identifierdoi:10.1016/j.nuclphysb.2005.03.033
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/35106
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleOn the Tensor/Scalar Ratio in Inflation with UV Cutoff
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