Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-09-14
Phys.Rev. D49 (1994) 2909-2917
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, EFI-93-51, FERMILAB-Pub-93/272-A, UMHEP-393. (Asymptotics of Ernst solutions clarified, typos repaired)
Scientific paper
10.1103/PhysRevD.49.2909
We consider dilaton gravity theories in four spacetime dimensions parametrised by a constant $a$, which controls the dilaton coupling, and construct new exact solutions. We first generalise the C-metric of Einstein-Maxwell theory ($a=0$) to solutions corresponding to oppositely charged dilaton black holes undergoing uniform acceleration for general $a$. We next develop a solution generating technique which allows us to ``embed" the dilaton C-metrics in magnetic dilaton Melvin backgrounds, thus generalising the Ernst metric of Einstein-Maxwell theory. By adjusting the parameters appropriately, it is possible to eliminate the nodal singularities of the dilaton C-metrics. For $a<1$ (but not for $a\ge 1$), it is possible to further restrict the parameters so that the dilaton Ernst solutions have a smooth euclidean section with topology $S^2\times S^2-{\rm\{pt\}}$, corresponding to instantons describing the pair production of dilaton black holes in a magnetic field. A different restriction on the parameters leads to smooth instantons for all values of $a$ with topology $S^2\times \R^2$.
Dowker Fay
Gauntlett Jerome P.
Kastor David A.
Traschen Jennie
No associations
LandOfFree
Pair Creation of Dilaton Black Holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pair Creation of Dilaton Black Holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pair Creation of Dilaton Black Holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-98247