1,721,237 research outputs found
La dottrina Obama. La politica estera americana dalla crisi economica alla presidenza Trump
No full textCase Studies in International Security. From the Cold War to the Crisis of the New International Order
No full textUn partenariato davvero strategico? Le relazioni tra Unione Europea e America Latina e i limiti della “politica estera” europea
No full text
Conclusioni. La politica estera di Obama: il bilancio e l'eredità per la presidenza Trump.
No full textOn the Origins of the Carter Doctrine: the United States and Persian Gulf Security (1979-1980)
No full textL'America Latina nella politica internazionale. Dalla fine del sistema bipolare alla crisi dell'ordine liberale
No full text
An Equivalent Gauge and the Equivalence Theorem
No full textI describe a novel covariant formulation of massive gauge theories in which the longitudinal polarization vectors do not grow with the energy. Therefore in the present formalism, differently from the ordinary one, the energy and coupling power-counting is completely transparent at the level of individual Feynman diagrams, with obvious advantages both at the conceptual and practical level.
Since power-counting is transparent, the high-energy limit of the amplitudes involving longitudinal particles is immediately taken, and the Equivalence Theorem is easily demonstrated at all orders in perturbation theory. Since the formalism makes the Equivalence Theorem self-evident, and because it is based on a suitable choice of the gauge, we can call it an “Equivalent Gauge”
- …
