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4 papers · 2 filters
The heavy quark decomposition of the S-matrix and its relation to the pinch technique
Joannis Papavassiliou, Kostas Philippides, Martin Schaden
We propose a decomposition of the S-matrix into individually gauge invariant sub-amplitudes, which are kinematically akin to propagators, vertices, boxes, etc. This decompsition is…
Tree-Level Unitarity Constraints on the Gravitational Couplings of Higher-Spin Massive Fields
A. Cucchieri, S. Deser, M. Porrati
We analyse the high-energy behavior of tree-level graviton Compton amplitudes for particles of mass m and arbitrary spin, concentrating on a combination of forward amplitudes that…
Non-Abelian Strong-Weak Coupling Duality in (String-Derived) N=4 Supersymmetric Yang-Mills Theories
L. Girardello, A. Giveon, M. Porrati +1
We study strong-weak coupling duality (S-duality) in N=4 supersymmetric non-Abelian Yang-Mills theories. These theories arise naturally as the low-energy limit of four-dimensional…
Target Space Duality in String Theory
A. Giveon, M. Porrati, E. Rabinovici
A review article submitted to Physics Report: Target space duality and discrete symmetries in string theory are reviewed in different settings.