Now showing items 12-13 of 13

    • Two-loop superstring five-point amplitude and S -duality 

      Gomez, Humberto; Mafra, Carlos R.; Schlotterer, Oliver (American Physical Society, 2016-02-24)
      The low-energy limit of the massless two-loop five-point amplitudes for both type IIA and type IIB superstrings is computed with the pure spinor formalism and its overall coefficient determined from first principles. For ...
    • Λ scattering equations 

      Gomez, Humberto (Springer Verlag, 2016-06-01)
      Abstract: The CHY representation of scattering amplitudes is based on integrals over the moduli space of a punctured sphere. We replace the punctured sphere by a double-cover version. The resulting scattering equations ...