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 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)
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Collision of domain walls and reheating of the brane universe. / Takamizu, Yu Ichi; Maeda, Keiichi.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 70, No. 12, 01.01.2004.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].
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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 -