2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49380We study the magnitudes of soft SUSY breaking parameters in heterotic string models with anomalous U(1) symmetry. In most cases, D-term contribution to soft scalar masses is expected to be comparable to or dominant over other contributions provided that supersymmetry breaking is mediated by the gravitational interaction and/or an anomalous U(1) symmetry and the magnitude of vacuum energy is not more than of order $m_{3/2}^2 M^2$.12 pages, talk given at SSS-99, Seoul, Korea, 23-27 June 1999High Energy Physics - Phenomenologytext