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Prog. Theor. Phys. Vol. 109 No. 3 (2003) pp. 357-369

[ Full Text PDF : FREE ACCESS (163K) ]

Born-Again Braneworld

Sugumi Kanno,1,* Misao Sasaki2,** and Jiro Soda3,***

1Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
2Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan
3Department of Fundamental Sciences, FIHS, Kyoto University, Kyoto 606-8501, Japan

(Received November 1, 2002)

Abstract:

We propose a cosmological braneworld scenario in which two branes collide and emerge as reborn branes whose tensions have signs opposite to the original tensions of the respective branes. In this scenario, gravity on each of the branes is described by a scalar-tensor-type theory in which the radion plays the role of the gravitational scalar, and the branes are assumed to be inflating. However, the whole dynamics are different from those of the usual inflation, due to the non-trivial dynamics of the radion field. Transforming the conformal frame to the Einstein frame, this born-again scenario resembles the pre-big-bang scenario. Thus, our scenario has features of both inflation and pre-big-bang scenarios. In particular, gravitational waves produced from vacuum fluctuations may have a very blue spectrum, while the inflaton field gives rise to a standard scale-invariant spectrum.


URL : http://ptp.ipap.jp/link?PTP/109/357/
DOI : 10.1143/PTP.109.357


*E-mail: kanno@phys.h.kyoto-u.ac.jp
**E-mail: misao@vega.ess.sci.osaka-u.ac.jp
***E-mail: jiro@phys.h.kyoto-u.ac.jp

[ Full Text PDF : FREE ACCESS (163K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 118 No. 4 (2007) pp. 701-713 :
    Kaluza-Klein Braneworld Cosmology with Static Internal Dimensions
    Sugumi Kanno, David Langlois, Misao Sasaki and Jiro Soda

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