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Quasiparticle Spectra, Charge-Density Waves, Superconductivity, and Electron-Phonon Coupling in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi mathvariant="normal">H</mml:mi><mml:mtext mathvariant="normal">โ</mml:mtext><mml:msub><mml:mrow><mml:mi mathvariant="normal">N</mml:mi><mml:mi mathvariant="normal">b</mml:mi><mml:mi mathvariant="normal">S</mml:mi><mml:mi mathvariant="normal">e</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>
High-resolution photoemission has been used to study the electronic structure of the charge-density wave (CDW) and superconducting dichalcogenide, 2H-NbSe2. From the extracted self-energies, important components of the quasiparticle interactions have been identified. In contrast to previously studied TaSe2, the CDW transition does not affect the electronic properties significantly. The electron-phonon โฆ