. The unfolded band structure is in good agreement with the ARPES data. The discrete, broadened energy levels hardly affect the comparison because their energy separation is less than the energy broadening of the experimental dispersions due to the finite hole lifetime and the experimental energy resolution. The broadening effects in the experiment also explain why the splitting of the calculated bands around the K-U' point is not resolved. In the lower left region of panel (e) there are ARPES peaks that do not correspond to any of the DFT bands. Their dispersion can be described, however, with the same theoretical valence bands but with the final states shifted by a certain ∆k z from the free-electron ones. The theoretical dispersion in the (hv, E b ) coordinates then becomes hv = (h