Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-08-31
Phys.Rev. D65 (2002) 086004
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, 1 figure
Scientific paper
10.1103/PhysRevD.65.086004
We calculate the tension of the D3-brane in the fivebrane background which is described by the exactly solvable SU(2)_k x U(1) world-sheet conformal field theory with large Kac-Moody level k. The D3-brane tension is extracted from the amplitude of one closed string exchange between two parallel D3-branes, and the amplitude is calculated by utilizing the open-closed string duality. The tension of the D3-brane in the background does not coincide with the one in the flat space-time even in the flat space-time limit: k -> infinity. The finite curvature effect should vanish in the flat space-time limit and only the topological effect can remain. Therefore, the deviation indicates the condensation of gravitino and/or dilatino which has been expected in the fivebrane background as a gravitational instanton.
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