INTERACTION OF MOVING BRANES WITH BACKGROUND MASSLESS AND TACHYON FIELDS IN SUPERSTRING THEORY
Rezaei Z., Kamani D.

Received: May 22, 2011

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Using the boundary state formalism, we study a moving Dp-brane in a partially compact spacetime in the presence of background fields: the Kalb-Ramond field B_{μ u}, a U(1) gauge field A_α, and the tachyon field. The boundary state enables us to obtain the interaction amplitude of two branes with the above background fields. The branes are parallel or perpendicular to each other. Because of the presence of background fields, compactification of some space-time directions, motion of the branes, and the arbitrariness of the dimensions of the branes, the system is rather general. Due to the tachyon fields and velocities of the branes, the behavior of the interaction amplitude reveals obvious differences from the conventional behavoir.