Moving fractional branes with background fields: Interaction and tachyon condensation

Abstract

We calculate the bosonic boundary state corresponding to a moving fractional Dp-brane in a partially orbifoldized spacetime R1,d-5×C2/Z2 in the presence of the Kalb-Ramond field, the U(1) gauge potential and the tachyon field. Using this boundary state, we obtain the interaction amplitude of two parallel moving Dp-branes with the above background fields. Various properties of the interaction will be investigated. In addition, we study effects of the tachyon condensation on a moving fractional Dp-brane with the above background fields through the boundary state formalism.