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Comparing light-front quantization with instant-time quantization
Philip D. Mannheim, Peter Lowdon, Stanley J. Brodsky
We compare light-front quantization and instant-time quantization both at the level of operators and at the level of their Feynman diagram matrix elements. At the level of operator…
Analytic constraints on the energy-momentum tensor in conformal field theories
Cédric Lorcé, Peter Lowdon
In this work we investigate the matrix elements of the energy-momentum tensor for massless on-shell states in four-dimensional unitary, local, and Poincaré covariant quantum field…
Gravitational form factor constraints and their universality
Peter Lowdon, Sabrina Cotogno, Cédric Lorcé
By adopting a local QFT framework one can derive in a non-perturbative manner the constraints imposed by Poincaré symmetry on the form factors appearing in the Lorentz covariant de…