Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-02-12
Nucl.Phys. B526 (1998) 199-228
Physics
High Energy Physics
High Energy Physics - Theory
31 pages, final version to be published in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(98)00296-X
Using the boundary state formalism, we perform a microscopic string analysis of the interaction between two D-branes and provide a local interpretation for the R-R force in the D0-D8 brane system. To do so, we construct BRST invariant vertex operators for the massless R-R states in the asymmetric picture that are proportional to potentials rather than field strengths. The Hilbert space of such R-R states contains combinations of two vectors that decouple from all physical amplitudes, even in the presence of boundaries. Identifying these vectors, we remove the null states and recover duality relations among R-R potentials. If we specify to the D0-D8 brane system, this mechanism implies that the R-R 1-form state has a non-zero overlap with both the D0-brane and the D8-brane, thus explaining from a local point of view the non-vanishing R-R contribution in the interaction for the D0-D8 brane system and those related to it by duality.
Billo' Marco
Frau Marialuisa
Lerda Alberto
Pesando Igor
Russo Remigio
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