### Abstract

We study particle production at the collision of two domain walls in 5-dimensional Minkowski spacetime. This may provide the reheating mechanism of an ekpyrotic (or cyclic) brane universe, in which two BPS branes collide and evolve into a hot big bang universe. We evaluate a production rate of particles confined to the domain wall. The energy density of created particles is given as [Formula Presented] where [Formula Presented] is a coupling constant of particles to a domain-wall scalar field, [Formula Presented] is the number of bounces at the collision and [Formula Presented] is the fundamental mass scale of the domain wall. It does not depend on the width [Formula Presented] of the domain wall, although the typical energy scale of created particles is given by [Formula Presented]. The reheating temperature is evaluated as [Formula Presented]. In order to have the baryogenesis at the electro-weak energy scale, the fundamental mass scale is constrained as [Formula Presented] for [Formula Presented].

Original language | English |
---|---|

Number of pages | 1 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 70 |

Issue number | 12 |

DOIs | |

Publication status | Published - 2004 Jan 1 |

### Fingerprint

### ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

**Collision of domain walls and reheating of the brane universe.** / Takamizu, Yu Ichi; Maeda, Keiichi.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Collision of domain walls and reheating of the brane universe

AU - Takamizu, Yu Ichi

AU - Maeda, Keiichi

PY - 2004/1/1

Y1 - 2004/1/1

N2 - We study particle production at the collision of two domain walls in 5-dimensional Minkowski spacetime. This may provide the reheating mechanism of an ekpyrotic (or cyclic) brane universe, in which two BPS branes collide and evolve into a hot big bang universe. We evaluate a production rate of particles confined to the domain wall. The energy density of created particles is given as [Formula Presented] where [Formula Presented] is a coupling constant of particles to a domain-wall scalar field, [Formula Presented] is the number of bounces at the collision and [Formula Presented] is the fundamental mass scale of the domain wall. It does not depend on the width [Formula Presented] of the domain wall, although the typical energy scale of created particles is given by [Formula Presented]. The reheating temperature is evaluated as [Formula Presented]. In order to have the baryogenesis at the electro-weak energy scale, the fundamental mass scale is constrained as [Formula Presented] for [Formula Presented].

AB - We study particle production at the collision of two domain walls in 5-dimensional Minkowski spacetime. This may provide the reheating mechanism of an ekpyrotic (or cyclic) brane universe, in which two BPS branes collide and evolve into a hot big bang universe. We evaluate a production rate of particles confined to the domain wall. The energy density of created particles is given as [Formula Presented] where [Formula Presented] is a coupling constant of particles to a domain-wall scalar field, [Formula Presented] is the number of bounces at the collision and [Formula Presented] is the fundamental mass scale of the domain wall. It does not depend on the width [Formula Presented] of the domain wall, although the typical energy scale of created particles is given by [Formula Presented]. The reheating temperature is evaluated as [Formula Presented]. In order to have the baryogenesis at the electro-weak energy scale, the fundamental mass scale is constrained as [Formula Presented] for [Formula Presented].

UR - http://www.scopus.com/inward/record.url?scp=85039603240&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85039603240&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.70.123514

DO - 10.1103/PhysRevD.70.123514

M3 - Article

AN - SCOPUS:19944432325

VL - 70

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 12

ER -