On ekpyrotic brane collisions

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http://hdl.handle.net/10138/310201

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Räsänen , S 2002 , ' On ekpyrotic brane collisions ' , Nuclear Physics, Section B , vol. 626 , no. 1 , pp. 183-206 . https://doi.org/10.1016/S0550-3213

Title: On ekpyrotic brane collisions
Author: Räsänen, Syksy
Contributor: University of Helsinki, Department of Physics
Date: 2002-02-14
Language: eng
Number of pages: 24
Belongs to series: Nuclear Physics, Section B
ISSN: 0550-3213
URI: http://hdl.handle.net/10138/310201
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.
Subject: 114 Physical sciences
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