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After an extended introduction, the thesis considers the electronicproperties of BSCCO and the recent progress in understanding the electronicstructure of this material. The main result of this part of the work is a modelof the Green's function that is later used for calculating the two-particleexcitation spectrum. Then, the matrix element effects in the photoemissionspectra of cuprates are discussed with a focus on the recently discoveredanomalous behavior of the ARPES spectra that partially originates from themomentum-dependent photoemission matrix element. The momentum- and excitationenergy dependence of the anomalous high-energy dispersion, termed "waterfalls",is covered in full detail. Finally, the work describes the relation of ARPESwith other experimental methods, such as INS spectroscopy. For the optimallydoped bilayer Bi-based cuprate, the renormalized two-particle correlationfunction in the superconducting state is calculated from ARPES data within anitinerant model based on the random phase approximation (RPA). Additionally,two other applications of the same approach are briefly sketched: the relationof ARPES to FT-STS, and the nesting properties of Fermi surfaces intwo-dimensional charge density wave compounds.

Angle-Resolved Photoelectron Spectroscopy Studies of the Many-Body Effects in the Electronic Structure of High-Tc Cuprates