2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44397We analyse some features of WW scattering processes at LHC. The severe cancellations between fusion diagrams and the other contributions evidence the necessity of complete calculations for studying the high WW invariant mass region and disentangling the standard Higgs case from new physics.To appear in Proceedings of the XVIII Workshop onQuantum Field Theory and High Energy Physics (QFTHEP04) - St. Petersburg June 2004High Energy Physics - Phenomenologytext