Grigera, T.S.Martín Mayor, VíctorParisi, G.Verrocchio, P.2023-06-202023-06-202002-040141-863710.1080/13642810110084588https://hdl.handle.net/20.500.14352/60296© 2002 Taylor & Francis. International Workshop on Disordered Systems (8th. 2001. Andalo, Italy). VMM was partly supported by CICyT AEN99-0990, AEN97-1693 and M.E.C. TSG was supported in part by CONICET (Argentina).The findings of X-ray and neutron scattering experiments on amorphous systems are interpreted within the framework of the theory of Euclidean random matrices. This allows to take into account the topological nature of the disorder, a key ingredient which strongly affects the vibrational spectra of those systems. We present a resummation scheme for a perturbative expansion in the inverse particle density, allowing an accurate analytical computation of the dynamical structure factor within the range of densities encountered in real systems.engjournal articlehttp://dx.doi.org/10.1080/13642810110084588http://www.tandfonline.comhttps://arxiv.org/abs/cond-mat/0104433v1open access53Frequency propagating modesInstantaneous normal-modesVitreous silicaDisordered-systemsForming liquidsDynamicsScatteringApproximationExcitations.Física-Modelos matemáticos