Double soft theorems in gauge and string theories

  • Anastasia Volovich
  • Congkao Wen
  • Michael Zlotnikov
Open Access
Regular Article - Theoretical Physics

Abstract

We investigate the tree-level S-matrix in gauge theories and open superstring theory with several soft particles. We show that scattering amplitudes with two or three soft gluons of non-identical helicities behave universally in the limit, with multi-soft factors which are not the product of individual soft gluon factors. The results are obtained from the BCFW recursion relations in four dimensions, and further extended to arbitrary dimensions using the CHY formula. We also find new soft theorems for double soft limits of scalars and fermions in \( \mathcal{N}=4 \) and pure \( \mathcal{N}=2 \) SYM. Finally, we show that the double-soft-scalar theorems can be extended to open superstring theory without receiving any α′ corrections.

Keywords

Scattering Amplitudes Supersymmetric gauge theory Extended Supersymmetry 

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  • Anastasia Volovich
    • 1
  • Congkao Wen
    • 2
  • Michael Zlotnikov
    • 1
  1. 1.Brown University Department of PhysicsProvidenceU.S.A.
  2. 2.I.N.F.N. Sezione di Roma “Tor Vergata”RomaItaly

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