2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38200The production of eta pi - system at low mass by the pi- beam in the Coulomb field of Be nuclei was studied. The cross section of the reaction pi- Be --> eta pi- Be was compared to the experimental data on the decay eta --> pi+ pi- gamma and to the theoretical predictions.11 pages, 5 figures, gzipped tar fileHigh Energy Physics - Experimenttext