Comment on "Density perturbations in the ekpyrotic scenario"

Martin J, Peter P, Pinto-Neto N, Schwarz D (2003)
PHYSICAL REVIEW D 67(2).

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
In the paper by J. Khoury , Phys. Rev. D 66, 046005 (2002), it is argued that the expected spectrum of primordial perturbations should be scale invariant in this scenario. Here we show that, contrary to what is claimed in that paper, the expected spectrum depends on an arbitrary choice of matching variable. As no underlying (microphysical) principle exists at the present time that could lift the arbitrariness, we conclude that the ekpyrotic scenario is not yet a predictive model.
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Zeitschriftentitel
PHYSICAL REVIEW D
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67
Zeitschriftennummer
2
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Martin J, Peter P, Pinto-Neto N, Schwarz D. Comment on "Density perturbations in the ekpyrotic scenario". PHYSICAL REVIEW D. 2003;67(2).
Martin, J., Peter, P., Pinto-Neto, N., & Schwarz, D. (2003). Comment on "Density perturbations in the ekpyrotic scenario". PHYSICAL REVIEW D, 67(2). doi:10.1103/PhysRevD.67.028301
Martin, J., Peter, P., Pinto-Neto, N., and Schwarz, D. (2003). Comment on "Density perturbations in the ekpyrotic scenario". PHYSICAL REVIEW D 67.
Martin, J., et al., 2003. Comment on "Density perturbations in the ekpyrotic scenario". PHYSICAL REVIEW D, 67(2).
J. Martin, et al., “Comment on "Density perturbations in the ekpyrotic scenario"”, PHYSICAL REVIEW D, vol. 67, 2003.
Martin, J., Peter, P., Pinto-Neto, N., Schwarz, D.: Comment on "Density perturbations in the ekpyrotic scenario". PHYSICAL REVIEW D. 67, (2003).
Martin, Jerome, Peter, Patrick, Pinto-Neto, Nelson, and Schwarz, Dominik. “Comment on "Density perturbations in the ekpyrotic scenario"”. PHYSICAL REVIEW D 67.2 (2003).

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