## Abstract

We discuss a generalized form of IIA/IIB supergravity depending on all R-R potentials C-(p) (p = 0, 1.... 9) as the effective field theory of Type IIA/IIB superstring theory. For the IIA case we explicitly break this R-R democracy to either p less than or equal to 3 or p greater than or equal to 5 which allows us to write a new bulk action that can be coupled to N = 1 supersymmetric brane actions.

The case of 8-branes is studied in detail using the new bulk & brane action. The supersymmetric negative tension branes without matter excitations can be viewed as orientifolds in the effective action. These D8-branes and O8-planes are fundamental in Type I' string theory. A BPS 8-brane solution is given which satisfies the jump conditions on the wall. As an application of our results we derive a quantization of the mass parameter and the cosmological constant in string units.

Original language | English |
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Title of host publication | New Developments in Fundamental Interaction Theories |

Editors | J. Lukierski, J. Rembieliński |

Place of Publication | MELVILLE |

Publisher | University of Groningen, Centre for Theoretical Physics |

Pages | 31-45 |

Number of pages | 15 |

Edition | 589 |

ISBN (Print) | 0-7354-0029-6 |

Publication status | Published - 2001 |

Event | 37th Karpacz Winter School of Theoretical Physics - , Poland Duration: 6-Feb-2001 → 15-Feb-2001 |

### Publication series

Name | AIP CONFERENCE PROCEEDINGS |
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Publisher | AMER INST PHYSICS |

Volume | 589 |

ISSN (Print) | 0094-243X |

### Other

Other | 37th Karpacz Winter School of Theoretical Physics |
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Country/Territory | Poland |

Period | 06/02/2001 → 15/02/2001 |

## Keywords

- II STRING THEORY
- COSMOLOGICAL CONSTANT
- 10 DIMENSIONS
- SUPERGRAVITY
- DUALITY
- COMPACTIFICATION
- N=2