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On ekpyrotic brane collisions

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Published in Nuclear Physics. B. 2002, vol. 626, no. 1, p. 183-206
Abstract We derive the five-dimensional metrics which describe a non-singular boundary brane collision in the ekpyrotic scenario in the context of general relativity, taking into account brane tension. We show that the metrics constrain matter created in the collision to have negative energy density or pressure. In particular, the minimal field content of heterotic M-theory leads to negative energy density. We also consider bulk brane-boundary brane collisions and show that the collapse of the fifth dimension is an artifact of the four-dimensional effective theory.
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RASANEN, Syksy. On ekpyrotic brane collisions. In: Nuclear Physics. B, 2002, vol. 626, n° 1, p. 183-206. https://archive-ouverte.unige.ch/unige:2570

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Deposited on : 2009-08-31

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