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The famous peak-dip-hump lineshape of the (\pi,0) photoemission spectrum ofthe bilayer Bi HTSC in the superconducting state is shown to be a superpositionof spectral features originating from different electronic states which resideat different binding energies, but are each describable by essentiallyidentical single-particle spectral functions. The 'superconducting' peak is dueto the antibonding Cu-O-related band, while the hump is mainly formed by itsbonding counterpart, with a c-axis bilayer coupling induced splitting of about140 meV.Comment: 5 pages: text + 4 figures, revtex (Fig.2 is replaced by more suitable  one

physical review letters

Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">(</mml:mo><mml:mi>π</mml:mi><mml:mo>,</mml:mo><mml:mn>0</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>Photoemission Spectra of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">B</mml:mi><mml:mi mathvariant="normal">i</mml:mi></mml:mrow><mml:mn>2</mml:…

Origin of the Peak-Dip-Hump Line Shape in the Superconducting-State(π,0)Photoemission Spectra ofBi2