Final states in diffractive DIS from ZEUS

Hadronic final states are analyzed for diffractive deep inelastic scattering ep → eXp, in which the virtual photon dissociates into a hadronic final state of mass 4 < MX < 35 GeV and the scattered proton, carrying more than 95% of the initial proton momentum, is detected in the Leading Proton Spectrometer. The event shape variables, thrust and sphericity, are studied as a function of the invariant mass MX and the measurements are compared to models of diffractive deep inelastic scattering as well as to measurements performed in e+e- collisions. Characteristics of the final states are further investigated in terms of energy flow and transverse energy flow in the center of mass of the system