Effective Actions for Heterotic M-Theory

  title={Effective Actions for Heterotic M-Theory},
  author={Jean-Luc Lehners and Paul McFadden and Neil Turok},
  journal={Physical Review D},
We discuss the moduli space approximation for heterotic M theory, both for the minimal case of two boundary branes only, and when a bulk brane is included. The resulting effective actions may be used to describe the cosmological dynamics in the regime where the branes are moving slowly, away from singularities. We make use of the recently derived colliding branes solution to determine the global structure of moduli space, finding a boundary at which the trajectories undergo a hard wall… 

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