Publicação: Scattering equations, generating functions and all massless five point tree amplitudes
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Springer
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We argue that one does not need to know the explicit solutions of the scattering equations in order to evaluate a given amplitude. We consider the most general quantity consistent with SL(2,C) invariance that can appear in an amplitude that admits a scattering equation description. This quantity depends on all cross ratios that can be formed from n points and we evaluate it for the first non-trivial case of n = 5. The combinatorial nature of the problem is captured through the construction of an appropriate generating function that depends on five variables.
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Scattering Amplitudes, Field Theories in Higher Dimensions
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Inglês
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Journal Of High Energy Physics. New York: Springer, n. 5, p. 1-11, 2015.
