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Showing 1 to 4 of 4 for “"Spinor-helicity"”.
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The KLT relations in unimodular gravity
… developed in that context, such as the spinor helicity formal-ism. In particular, we show, up to five-points and tree-level, that the KLT relations of perturbative gravity hold for trace free or unimodular gravity. This work is in conjunction with a paper written with A. Welman, J. …
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Effective field theories for the LHC
… collinear effective theory, I also develop a helicity operator basis, which facilitates matching calculations to fixed order computations performed using spinor-helicity techniques, and demonstrate its utility by computing an observable relevant for studying the properties of the newly …
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Bootstrap Techniques in Flat Space and Cosmology
The scientific understanding of the Universe is evolving at a rapid pace. Each new experiment yields more and more accurate measurements of its fundamental parameters. The standard cosmological model postulates a very early period of fast expansion, but the details of its underlying mechanism …
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Études in Ambitwistor Strings - Exploring new models, higher loops and curved backgrounds
… of two terms, each involving left/right-handed spinors only. We use this splitting result to derive a formula for $ \mathcal{N} = 4 $ super Einstein-Yang-Mills in twistor space based on the refined 4d scattering equations. It computes all tree level amplitudes, in all trace sectors, of minimally …