D-branes in N=2 strings -: art. no. 055

We study various aspects of D-branes in the two families of closed N = 2 strings denoted by alpha and beta in [3]. We consider two types of N = 2 boundary conditions, A-type and B-type. We analyse the D-branes geometry. We compute open and closed string scattering amplitudes in the presence of the D-branes and discuss the results. We find that, except the space filling D-branes, the B-type D-branes decouple from the bulk. The A-type D-branes exhibit inconsistency. We construct the D-branes effective worldvolume theories. They are given by a dimensional reduction of self-dual Yang-Mills theory in four dimensions. We construct the D-branes gravity backgrounds. Finally, we discuss possible N = 2 open/closed string dualities.