Helicity amplitudes for matter-coupled gravity

Details Helicity amplitudes for matter-coupled gravity Helicity amplitudes for matter-coupled gravity

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gregr..26..409a&link_type=abstract

General Relativity and Gravitation, Volume 26, Issue 4, pp.409-425

Physics

3

Scientific paper

The great simplicity attained by the Weyl-van der Waerden spinor technique in the evaluation of helicity invariant amplitudes is shown to apply in the cumbersome calculations within the framework of linearized gravitation. Once the graviton couplings to spin-0, 1/2, 1, and 3/2 particles are given, we exhibit the reach of this method by evaluating, as an example, the helicity amplitudes for the process electron + positron → photon + graviton in a very straightforward way.

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