2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123019The scattering process responsible for connecting the bands remains one of the last open questions on the physical properties of MgB2. Through the analysis of the equilibrium and photo-induced far-infrared properties as well as electron spin resonance of MgB2 we propose a phonon mediated energy transfer process between the bands based on the coupling of quasiparticles to an E2g phonon.6 pages 2 figures included. Submitted to NATO Advanced Research Workshop Proceedings (Miami January 2004)Superconductivitytext