Cosmic D- and DF-strings from D3Dbar3: Black Strings and BPS Limit

Details Cosmic D- and DF-strings from D3Dbar3: Black Strings and BPS Limit Cosmic D- and DF-strings from D3Dbar3: Black Strings and BPS Limit

2006-12-28

arxiv.org/abs/hep-th/0612285v3

Phys.Rev.D77:065027,2008

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 5 figures

Scientific paper

10.1103/PhysRevD.77.065027

We study D- and DF-strings in a D3${\bar {\rm D}}3$ system by using Dirac-Born-Infeld type action. In the presence of an electric flux from the transverse direction, we discuss gravitating thick D-string solutions of a spatial manifold, ${\rm S}^{2}\times {\rm R}^{1}$, in which straight D-strings stretched along the R${}^{1}$ direction are attached to the south and north poles of the two-sphere. There is a horizon along its equator, which means the structure of black strings is formed. We also discuss the BPS limit for thin parallel D- and DF-strings in both flat and curved spacetime. We obtain the BPS sum rule for an arbitrarily-separated multi-string configuration with a Gaussian type tachyon potential. At the site of each thin BPS D(F)-string, the pressure takes a finite value. We find that there exists a maximum deficit angle $\pi$ in the conical geometry induced by thin BPS D- and DF-strings.

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