2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43933After an introduction on possible scenarios in the TeV energy region in pp collisions, extrapolated from the knowledge of the GeV energy region, attention is focused on the onset of a third class of events, harder than the semi-hard and soft ones identified at SpS and Tevatron. The expected features and signatures in multiplicity fluctuations, forward-backward correlations and collision energy density are discussed.5 pages, talk given at XXXIV International Symposium on Multiparticle Dynamics, Sonoma County, California, USA, July 26-August 1, 2004High Energy Physics - Phenomenologytext