Related paper Measurement of inelastic, single- and double-diffraction cross sections in proton-proton collisions at the LHC with ALICE Lowest order Pomeron exchange graphs contributing to elastic (left), to single- (middle) and to double-diffractive (right) proton-proton scattering. $\mathbb{P}$ stands for Pomeron, p for proton and $X$ ($X_1$, $X_2$) for the diffractive system(s).[png] [eps]