2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203643We present results of a study of charged particle track and vertex reconstruction with a beam telescope made of four layers of 50 micron-thin CMOS monolithic pixel sensors using the 120 GeV protons at the FNAL Meson Test Beam Facility. We compare our results to the performance requirements of a future e+e- linear collider in terms of particle track extrapolation and vertex reconstruction accuracies.9 pages, 7 figures submitted to Nuclear Instruments and Methods AInstrumentation and DetectorsTracking and Vertexing with a Thin CMOS Pixel Beam Telescopetext