  We present the inclusive and identified particle (pion, proton and their
antiparticle) production in Single Diffraction Dissociation and Central
Diffraction processes with the STAR detector at RHIC. The forward-scattered
proton(s) are tagged in the STAR Roman Pot system while the charged particle
tracks are reconstructed in the STAR Time Projection Chamber. Ionization energy
loss and time of flight of charged particles are used for particle
identification. In addition, the proton-antiproton production asymmetry as a
function of rapidity is measured and used to study the baryon number transfer
over a large rapidity interval in Single Diffraction Dissociation.
