nLab
KLT relations

Context

Physics

physics, mathematical physics, philosophy of physics

Surveys, textbooks and lecture notes


theory (physics), model (physics)

experiment, measurement, computable physics

Duality

Contents

Idea

The KLT relations express certain scattering amplitudes in gravity equivalently in terms of scattering amplitudes in Yang-Mills theory.

These relations are manifest in string theory-UV-completions of gravity+Yang-Mills theory, where they were originally found and from which the QFT relations have been deduced: in string theory the graviton is an excitation of the closed string and the gluon of the open string. But disk-shaped string diagram can be read in two-ways: either as a closed-string vacuum diagram or as an open-string tree-level scattering diagram. This open/closed string duality of string scattering amplitudes yields the KLT relations.

References

  • Zvi Bern, The KLT relations in field theory, Living Reviews in Relativity

  • N. E. J. Bjerrum-Bohr, K. Risager, String theory and the KLT-relations between gravity and gauge theory including external matter (arXiv:hep-th/0407085)

  • Bo Feng, Song He, Rijun Huang, Yin Jia, Note on New KLT relations (arXiv)

  • Zvi Bern, John Joseph M. Carrasco, Henrik Johansson, Perturbative Quantum Gravity as a Double Copy of Gauge Theory, Phys. Rev. Lett. 105, 061602 – Published 3 August 2010 (arXiv:1004.0476)

Revised on March 16, 2014 07:45:43 by Urs Schreiber (89.204.137.143)