Description
Chair: Hector Puerta Ramisa
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Maria Polackova (University of Edinburgh)19/12/2024, 09:10
We introduce an efficient method for deriving hierarchical constraints on the discontinuities of individual Feynman integrals. This method can be applied at any loop order and particle multiplicity, and to any configuration of massive or massless virtual particles. The resulting constraints hold to all orders in dimensional regularization, and complement the extended Steinmann relations --...
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Kymani Armstrong-Williams (Queen Mary University of London)19/12/2024, 09:40
An open problem in theoretical physics is to combine all four of the fundamental forces of nature into one single theory. Problematically, gravity has proven difficult to reconcile with the other forces. Recently, relationships between scattering amplitudes (the quantity related to the probability for an interaction to occur between two or more particles) in non-abelian gauge theories (such as...
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Theo Keseman (Imperial College London)19/12/2024, 10:10
One of the main questions in the classical double copy is its precise realisation around curved spacetime. One can make progress using a recent twistor formulation of the double copy. In the case of topologically massive theories in curved spacetime, it can give rise to the previously known double copy of waves. However the curved spacetime alters the straightforward "equal mass" prescription...
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