Non-threshold (F, Dp) bound states

In the:previous paper [hep-th/9904112], we argued that then exist BPS bound states of Dp branes carrying certain units of quantized constant electric field for every p (with 1 less than or equal to p less than or equal to 8). Each of:these bound states preserves one half of the spacetime supersymmet ries, In this paper, we construct:these bound state configurations explicit ly for 2 less than or equal to p less than or equal to 7 from Schwarz's (m, n)-string or (F, D1) bound state in type IIB string theory by T-dualities along the transverse directions. We calculate:the charge per (2 pi)(p-1)alp ha'((p-1)/2) of (p-1)-dimensional area for F-strings in (F,Dp) and: the ten sion for each of these bound states. The results agree precisely with those obtained previously from the worldvolume study. We study the decoupling li mit for the (F,D3) bound state and find that Maldacena's AdS(5)/CFT4 corres pondence may hold true even with respect to this bound state but now with a n effective string coupling rather than the usual string coupling. This cou pling is quantized and can be independent of the usual string coupling in a certain limit. (C) 1999 Published by Elsevier Science B.V. All rights rese rved.