The Geometry of Fractional Branes

Details The Geometry of Fractional Branes The Geometry of Fractional Branes

2000-12-05

arxiv.org/abs/hep-th/0012035v2

Nucl.Phys. B602 (2001) 39-60

Physics

High Energy Physics

High Energy Physics - Theory

Latex file, 23 pages

Scientific paper

10.1016/S0550-3213(01)00107-9

By looking at fractional Dp-branes of type IIA on T_4/Z_2 as wrapped branes and by using boundary state techniques we construct the effective low-energy action for the fields generated by fractional branes, build their world-volume action and find the corresponding classical geometry. The explicit form of the classical background is consistent only outside an enhancon sphere of radius r_e, which encloses a naked singularity of repulson-type. The perturbative running of the gauge coupling constant, dictated by the NS-NS twisted field that keeps its one-loop expression at any distance, also fails at r_e.

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