Listar por autor "Helset, Andreas"

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New factorization relations for nonlinear sigma model amplitudes

Bjerrum-Bohr, Niels Emil Jannik; Gomez, Humberto; Helset, Andreas (American Physical Society, 2019-02-15)

We obtain novel factorization identities for nonlinear sigma model amplitudes using a new integrand in the Cachazo-He-Yuan double-cover prescription. We find that it is possible to write very compact relations using only ...
Scattering equations and a new factorization for amplitudes. Part II. Effective field theories

Gomez, Humberto; Helset, Andreas (Springer Verlag, 2019-05-01)

We continue the program of extending the scattering equation framework by Cachazo, He and Yuan to a double-cover prescription. We discuss how to apply the double-cover formalism to effective field theories, with a special ...