  We propose a cosmological braneworld scenario in which two branes collide and
emerge as reborn branes with signs of tensions opposite to the original
tensions of respective branes. In this scenario, the branes are assumed to be
inflating. However, the whole dynamics is different from 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, the gravitational waves produced from
vacuum fluctuations will have a very blue spectrum, while the inflaton field
will give rise to a standard scale-invariant spectrum.
