Descrizione spazio-temporale di processi elementari, Tachioni e Causalità
In this preliminary article, a possible spacetime description of elementary interactions is sketched, by using wave-packets. This description suggests the assumption of an operator for the chronotopical variables, i.e. also for the observable time. In particular, the position operator is extended for "tachyons" too. In the previous framework, an elementary formulation of macro-causality may be forwarded, and the new "anticausality" principle -proposed for processes with antiparticle exchanges- may...