D-branes and the Conifold Singularity

Details D-branes and the Conifold Singularity D-branes and the Conifold Singularity

1996-07-16

arxiv.org/abs/hep-th/9607131v1

Phys.Lett. B388 (1996) 29-34

Physics

High Energy Physics

High Energy Physics - Theory

Latex file, 14 pages

Scientific paper

10.1016/0370-2693(96)01128-8

We analyze in detail the description of type IIB theory on a Calabi-Yau three-fold near a conifold singularity in terms of intersecting D-branes. In particular we study the singularity structure of higher derivative $F$-terms of the form $F_g W^{2g}$ where $W$ is the gravitational superfield. This singularity is expected to be due to a one -loop contribution from a charged soliton hypermultiplet becoming massless at the conifold point. In the intersecting D-brane description this soliton is described by an open string stretched between the two D-branes. After identifying the graviphoton vertex as a closed string operator we show that $F_g$'s have the expected singularity structure in the limit of vanishing soliton mass.

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