BPS Analysis of the Charged Soliton Solutions of D-brane Worldvolume   Theory from the Viewpoint of Target-space Supersymmetry
  We investigate BPS properties of the charged soliton solutions of D-brane worldvolume theory, which is described by the supersymmetric Dirac-Born-Infeld action, by means of the N=2 target-space supersymmetry algebra. Our results agree with those obtained previously. We also extend our BPS analysis to the case where axion background exists. 
Toshiya Suzuki (Hokkaido U.)