2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18404The famous peak-dip-hump lineshape of the (π,0) photoemission spectrum of the bilayer Bi HTSC in the superconducting state is shown to be a superposition of spectral features originating from different electronic states which reside at different binding energies, but are each describable by essentially identical single-particle spectral functions. The 'superconducting' peak is due to the antibonding Cu-O-related band, while the hump is mainly formed by its bonding counterpart, with a c-axis bilayer coupling induced splitting of about 140 meV.5 pages: text + 4 figures, revtex (Fig.2 is replaced by more suitable one)SuperconductivityStrongly Correlated Electronstext