Talk by Thomas Søndergaard (NBI) - HET journal club – Niels Bohr Institute - University of Copenhagen

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Talk by Thomas Søndergaard (NBI) - HET journal club

The Spinor Helicity Formalism

This will be a very basic talk about the spinor helicity formalism used in writing down compact expressions for scattering amplitudes. I will discuss the underlying philosophy behind the formalism, show how to express quantities like the four-momenta, polarization vectors, Dirac spinors ....etc. in this language,  and give explicit examples of amplitudes written in this formalism. If the time permits it I might also comment on the extension of the formalism to six dimensions (see arXiv:0902:0981 by O'Connel and Cheung).